Answers
Related Questions
In the 1940s and 1950s, Dr Barbara McClintock studied mosaic colour patterns in corn and discovered their unstable inheritance and the underlying mechanisms. In 1983 she was awarded the Nobel Prize in Physiology/Medicine for her discovery, and is now considered one of the most influential geneticists of the 20th century. (a) Name two synonymous names for the genetic elements that Dr McClintock discovered
(b) What can these genetic elements do, and what can the consequences be for a gene and for a host genome?
(c) Which gene function do these elements require for their activity, and what are the two classes that these elements can be assigned to, and how do these two classes function in a host genome? (d) Why did Dr McClintock initially find resistance to publish her findings and in the scientific community, to the point that she did not publish these for 20 years, and why were her ground-breaking research findings a paradigm shift in the end?
Answers
They are known by two synonymous names: transposable elements or transposons. These elements can move within a genome and have various consequences for a gene and the host genome.
(a) The two synonymous names for the genetic elements discovered by Dr. McClintock are transposable elements and transposons. These terms refer to segments of DNA that have the ability to move or transpose within a genome.
(b) Transposable elements can have various effects on genes and the host genome. They can insert themselves into a gene, disrupting its function and causing mutations. They can also influence gene expression by inserting near regulatory regions, affecting the level of gene activity. Additionally, transposable elements can cause genomic rearrangements, such as duplications, deletions, or inversions, altering the structure of the genome.
(c) The activity of transposable elements requires specific genes called transposase genes. Transposase enzymes catalyze the movement of transposable elements within the genome. Transposable elements can be classified into two main classes: Class I retrotransposons and Class II DNA transposons. Class I retrotransposons transpose via a copy-and-paste mechanism, where the element is first transcribed into RNA, then reverse transcribed back into DNA and inserted at a new location. Class II DNA transposons, on the other hand, move through a cut-and-paste mechanism, directly excising from one genomic location and reinserting into another.
(d) Dr. McClintock initially faced resistance and skepticism from the scientific community, which led her to withhold publishing her findings for nearly 20 years. At the time, the prevailing belief was that genes were fixed entities with stable positions in the genome. Dr. McClintock's discovery of mobile genetic elements challenged this view and was initially met with skepticism.
Learn more about mutations here:
https://brainly.com/question/13923224
#SPJ11
Population density ?
Answers
Answer:
The amount of people per square mile or kilometer of land; also called arithmetic density.
the wet bulb temperature is 10 C the Dry bulb temperature is 14 C what is the relative humidity?
Answers
The relative humidity is approximately 22.9% based on the given wet bulb temperature of 10°C and dry bulb temperature of 14°C.
Relative humidityWet bulb temperature: 10°C = 50°F
Dry bulb temperature: 14°C = 57.2°F
SVP at wet bulb temperature: 0.284 * \(e^(17.27 * 10 / (10 + 237.3))\)= 0.284 * \(e^(-7.09)\) = 0.284 * 0.000828 = 0.0002356 psi
SVP at dry bulb temperature: 0.284 *\(e^(17.27 * 14 / (14 + 237.3))\) = 0.284 * e^(-5.97) = 0.284 * 0.002562 = 0.0007296 psi
AVP = 0.0002356 - (0.00066 * (57.2 - 50) * 14.7) = 0.0002356 - (0.00066 * 7.2 * 14.7) = 0.0002356 - 0.0686 = 0.000167 psi
RH = (AVP / SVP at dry bulb temperature) * 100
RH = (0.000167 / 0.0007296) * 100 = 0.229 * 100 = 22.9%
Learn more about relative humidity:https://brainly.com/question/30415486
#SPJ1
How might an inherited trait, such as height, be influenced by both genetic and environmental factors?
Answers
Answer:
Explanation:
For most individuals, though, height is controlled largely by a combination of genetic variants that each have more modest effects on height, plus a smaller contribution from environmental factors (such as nutrition). More than 700 such gene variants have been discovered and many more are expected to be identified.
What type of mutation involves changing one letter to another letter in a DNA
strand.
Answers
Answer:
Substitution
Explanation:
Substitution is when one letter is switched out for another.
What occurs when the sequence of bases that is coded is incorrect?
the resulting protein may not function properly
o the resulting protein will be disposed of
the resulting protein will disintegrate
O No answer text provided.
Answers
Help help help help help help help help help
Answers
Very warm with an average daily temperature of 28°C.
The temperature never drops below 20°C and rarely exceeds 35°C.
The atmosphere is hot and humid .
The climate is consistent all year round.
There are no seasons.
Most rainforests are structured in four layers: emergent, canopy, understory, and forest floor. Each layer has unique characteristics based on differing levels of water, sunlight, and air circulation.
Orchids. Orchids make up one of the largest, most varied flowering plant families with over 20,000 known species.
Hemiepiphytes.
Lianas, Vines and Creepers, and
Bromeliads.
Logging interests cut down rain forest trees for timber used in flooring, furniture, and other items. Power plants and other industries cut and burn trees to generate electricity. The paper industry turns huge tracts of rain forest trees into pulp
Some types of plants only survive for one growing season, dying back at the end of the summer or early fall. But they make lots of seeds that will sprout the next year. These plants are called annuals. If you purchased pansies or marigolds for your garden last summer they are examples of annuals. The whole plant, roots, stems, and leaves die but the seeds endure. In order to germinate next spring, many seeds require a period of cold weather which our area certainly supplies.
Inbreeding is the mating of organisms closely related by ancestry. It goes against the biological aim of mating, which is the shuffling of DNA.
a. True
b. False
Answers
"Inbreeding is the mating of organisms closely related by ancestry. It goes against the biological aim of mating, which is the shuffling of DNA" is true.
Here, the organisms that are closely related by ancestry are often genetically identical, which can lead to various problems in the long run. Thus, it goes against the biological aim of mating, which is the shuffling of DNA.
Inbreeding is the mating of organisms closely related by ancestry. It goes against the biological aim of mating, which is the shuffling of DNA.
The given statement "Inbreeding is the mating of organisms closely related by ancestry. It goes against the biological aim of mating, which is the shuffling of DNA" is true. Here, the organisms that are closely related by ancestry are often genetically identical, which can lead to various problems in the long run. Thus, it goes against the biological aim of mating, which is the shuffling of DNA.
Thus, it can be concluded that the given statement is true. Inbreeding is the mating of organisms closely related by ancestry. It goes against the biological aim of mating, which is the shuffling of DNA.
To know more about DNA visit
https://brainly.com/question/30006059
#SPJ11
help asap 20 pts and branliest
Define the following adaptations and provide at least one example: Definition Example Camouflage Mimicry Warning Coloration
Answers
Answer:
Alright.
Explanation:
Camouflage!
'Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see or by disguising them as something else.'
(If it's not that then it's most likely Mimicry-)
Identify the transport proteins. Check all that apply.
hemoglobin
keratin
collagen
myoglobin
myosin
albumin
actin
DONE
Answers
The transport proteins are hemoglobin, myoglobin, and albumin. Specialized proteins called "transport proteins" are in charge of carrying chemicals across cell membranes.
Because they allow important substances such as nutrients, ions, and hormones to move in and out of the cell, these proteins are important for maintaining proper cell function. Channels and carriers are two basic divisions of transport proteins. Some chemicals can pass through the membrane because channel proteins form a pore or channel there.
Therefore, the correct options are A, D and F.
Learn more about Transport proteins, here:
https://brainly.com/question/28765099
#SPJ1
In multicellular organisms, cells working together and performing similar functions are called...
Question 9 options:
organ systems.
organisms
tissues
organs
Answers
Answer:
tissues
Explanation:
What causes the Pacific Ring of Fire to have so many volcanoes.
Answers
explain the relationship between the dominant allele of a gene and the recessive allele of the same gene
Answers
Answer:
see below
Explanation:
The relationship between a dominant allele and a recessive allele of the same gene is that the dominant allele will always be expressed if it is present. This means that if an organism has one or two copies of the dominant allele, it will always be expressed in the organism's phenotype. On the other hand, the recessive allele will only be expressed if the organism has two copies of the recessive allele. In this case, the dominant allele will be masked and the recessive allele will be expressed.
the basal metabolic rate accounts for the majority of our total energy output each day.
Answers
The given statement, "the basal metabolic rate accounts for the majority of our total energy output each day, is true because BMR refers to the energy expended by the body at rest to maintain basic physiological functions.
BMR refers to the energy expended by the body at rest to maintain basic physiological functions such as breathing, circulating blood, regulating body temperature, and supporting cellular processes. These essential functions require a constant supply of energy.
Research suggests that the basal metabolic rate typically represents around 60-75% of the total daily energy expenditure in sedentary individuals. However, it's important to note that the actual percentage may vary depending on factors such as age, gender, body composition, and individual activity levels.
While physical activity and other factors can influence our overall energy expenditure, the basal metabolic rate forms the foundation of energy expenditure and plays a significant role in maintaining basic bodily functions.
Complete question:
The basal metabolic rate accounts for the majority of our total energy output each day. True/ False
Learn more about basal metabolic rate:
https://brainly.com/question/14095049
#SPJ11
oxytocin is a peptide hormone that causes the smooth muscle of the uterus to contract, but it has no effect on the smooth muscle cells of the small intestine. this difference in responsiveness exists because
Answers
Oxytocin (OXT) animates uterine constriction during work and milk discharge during nursing and is associated with the focal intercession of connection conduct.
Having lower-than-ordinary degrees of oxytocin is interesting. Low degrees of oxytocin could stop uterine constrictions during the birthing system and forestall milk discharge in the wake of conceiving an offspring.
Oxytocin invigorates the uterine muscles to contract and furthermore expands the creation of prostaglandins, which increment the constrictions further. Fabricated oxytocin is some of the time given to instigate work in the event that it has not begun normally or it very well may be utilized to reinforce constrictions to help labor.
To learn more about Oxytocin here
https://brainly.com/question/1996049
#SPJ4
PLEASE HELP , WILL GIVE BRAINLIEST. In Mendel’s first experiment, he crossed tall plants with short plants and found tall plants were dominant to short plants. Draw a Punnett square to describe this experiment and list the genotypes and phenotypes of the offspring.
Answers
You are building a birdhouse when you cut your finger. Predict which body systems would be immediately involved with your reaction to the cut.
A. nervous system, circulatory system, integumentary system
B. digestive system, endocrine system, lymphatic system
C. integumentary system, reproductive system, muscular system
D. skeletal system, respiratory system, urinary system
Answers
Answer:
A.
Explanation:
The nervous system, circulatory system, integumentary system, will be involved.
Hope this helps, have a great day.
The body systems that would immediately get involved with my reaction to the cut are nervous system, circulatory system, integumentary system. That is option A
The systematic factors that are required for wound healing after sustaining a cut in the finger include:
The nervous system: here the nerve cells in the skin help wounds to heal. When an injury occurs, cells known as glial cells change into repair cells and disseminate into the wound, where they help the skin to regenerate.The circulatory system: The cut surfaces become inflamed and blood clot and cell debris fill the gap between them. Phagocytes from the blood stream, begins to remove the clot and cell debris stimulates fibroblast.The integumentary system: the skin contains extracellular matrix (ECM) which is made of collagen and elastic fibres that provide structure to the skin and are necessary for wound closure.Learn more here:
https://brainly.com/question/12130779
How many atoms are present in 3H^2O
Answers
Answer:
3486784401
Explanation:
3^20 is 3486784401
I'm not 100 percent sure though, I'm sorry
Answer:
there are 6 hydrogen atom and 3 oxygen atoms
present
What should sam recommend to the student regarding the substitution for procedures that mirror the ones used in the lab you just completed? explain your answer by including the testing results that the almond milk will generate for proteins, lipids, reducing sugars, starch, and dna based on your experience when completing the exercises for this laboratory.
Answers
Almond milk comes from plants, and neither lactose nor cholesterol are found in it. People who are lactose intolerant can drink this kind of milk because it typically has few saturated fats.
The laboratory process for measuring the protein content of 2% almond lactose differs slightly from that of 2% normal fresh milk due to the absence of lactose, cholesterol, and saturated fats. Barfoed's test and Selivanoff's test are typically used to analyze the sugar content of conventional cow milk, cholesterol but a third test—the Benedict test—is needed for almond milk because it has far fewer sugars than regular milk. Since almond milk contains more calcium and sodium than regular cow's milk, a typical titration method should be carried out.
Learn more about cholesterol here
https://brainly.com/question/27756235
#SPJ4
Question 3 (1 point) What are the building blocks for all matter including solid, liquids, and gases? Cells Organelles Atoms Protons
Answers
Answer:
atoms
Explanation:
Do clams have eyes?.
Answers
Why isn't medical and chemical waste placed in landfills ? A. It would contaminate the land and water with dangerous poisons B. It would cause the landfills to fill up too quickly C. It would prevent refuse from breaking down over time D. It would contribute to global climate change
Answers
Answer:
A. It would contaminate the land and water with dangerous poisons
Explanation:
Putting medical and chemical waste into landfills has extremely dangerous consequences to the environment and public health.
If they were put into landfills, these toxic wastes would leech into the soil and groundwater below them.
These toxins can accumulate over time, and harm plants and animals.
Humans may also absorb these toxic chemicals.
So, the correct answer is A. It would contaminate the land and water with dangerous poisons
Answer:
A
Explanation:
The water and land will become contaminated which will harm or endanger all the living organisms and us humans around it. Because they use the water and land source.
What surroundeds the brain when swelling
Answers
Which rely on other organisms for their energy and food supply? A. primary producers B. biomass C. autotrophs D. consumers
Answers
Answer: D, consumers
Explanation:
They eat other organisms for their energy.
Anything that can cause damage to DNA?
Answers
Answer:
intracellular metabolism, replication, and exposure to genotoxic agents, suck as ionizing radiation.
What is the rate of change of y with respect to x ?
Answers
explain the secondary sexual growth in both male and female.
Answers
Answer:
Although the question is pretty simple,the answer,I'm afraid, could occupy a whole volume of a book.
But very simply put the secondary sexual growth in males is under the influence of testosterone. Males also produce estrogen but in very small amounts,which makes the effect of estrogen very minimal and almost negligible.
Sexual growth in females is under the influence of estrogen and then progesterone.
In both cases,the physiological process is quite similar:
At puberty in males,the hypothalamus produces gonadotropin releasing hormones which causes the anterior pituitary lobe to produce leutinizing hormones(LH) and follicle stimulating hormones(FSH). LH acts on leydig cells in the seminiferous tubules of the testes to produce testosterone and FSH acts on the Sertoli cells in the seminiferous tubules of the testes to produce androgen binding proteins(ABP). Together testosterone and ABP cause sperm production.
At puberty in females, ,the hypothalamus produces gonadotropin releasing hormones which causes the anterior pituitary lobe to produce leutinizing hormones(LH) and follicle stimulating hormones(FSH). FSH causes growth of the primordial follicle into a mature Graafian follicle while LH presence causes exocytosis of the mature oocyte (ovulation) in about 48hours.
May I get help with explanation using punnets squares for number 2
Answers
The sex ratio, as always is 50%-50%.
Daugthers will have 50% chance of being carriers.
Sons will have 50% chance of being hemophiliacs.
In other words:
25% of the total offspring will be carriers of the condition (half of the females).
25% of the total offspring will be hemophiliacs (half of the males) .
Qué es una fuente renovable de energía?
Answers
Answer:
Una fuente de energía renovable significa energía que es sostenible, algo que no se puede agotar o que es interminable, como el sol. ... Significa fuentes de energía que son alternativas a las fuentes no sostenibles más comúnmente utilizadas, como el carbón.
The 5' end of the DNA molecule is considered the ______, while the 3' end of the DNA molecule is considered the ______.
a. End, middle
b. Beginning, end
c. End, beginning
d. Middle, end
Answers
The 5' end of the DNA molecule is considered the End, while the 3' end of the DNA molecule is considered the beginning.Hence, the correct option is C.
In the context of DNA molecules, the 5' end refers to the end of the DNA strand that has a phosphate group attached to the 5' carbon of the sugar molecule in the DNA backbone. The phosphate group is located at the "end" of the DNA molecule, and hence the 5' end is often referred to as the "end" of the DNA molecule.
On the other hand, the 3' end refers to the end of the DNA strand that has a hydroxyl group (-OH) attached to the 3' carbon of the sugar molecule in the DNA backbone. The hydroxyl group is located at the "end" of the DNA molecule, and hence the 3' end is often referred to as the "beginning" of the DNA molecule.
Hence, the correct option is C.
To know more about DNA here
https://brainly.com/question/16099437
#SPJ4