Answer:
The genes are linked, and the arrangement is coupled (one homolog has both dominant alleles; the other homolog has both recessive alleles).
RY
/
ry
Explanation:
R_= colored aleurone
rr= colorless aeurone
Y_= green plant
yy= yellow plant
They do a testcross between a plant of unknown genotype and phenotype and a plant that is homozygous recessive for both traits (yr/yr) the following F1 is obtained:
- 88 Colored, green (RY/ry)
- 92 colorless, yellow (ry/ry)
- 8 colorless, green (rY/ry)
- 12 colored, yellow (Ry/ry)
If the genes assorted independently, all of the possible offspring phenotypes would appear in the same frequency. However, they obtained 2 phenotypes much more abundant that the other two. Since recombination is a rare event during crossing over, when two genes are linked the recombinant gametes are produced less frequently than the parentals.
We can propose that the phenotypes Colored, green (RY) and colorless yellow (ry) are the parental gametes, and the unknown plant has the arrangement RY/ry, with both genes linked.
Answer:
laws.
Explanation:
hypothesis is an educated guess
therous are ideas
and laws are supported by observations. like newton's law.
Answer:
The correct answer is A. The region of the diencephalon that is responsible for maintaining homeostasis is the hypothalamus.
Explanation:
One of the main functions of the hypothalamus is to control the pituitary gland, an endocrine gland that participates in the regulation of various functions of the organism, many of them related to homeostasis (regulation of glycemia, osmolarity, etc).
Answer:
either the first one lactic acid fermentation or the third one alcoholic fermentation
<span>Unidirectional flow in the heart is ensured because the heart contains valves that prevent backflow.
These valves keep the flow of the heart going in one direction (hence the name "unidirectional").</span>
