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jamalnellum56
04.03.2021 •
Biology
What is a primary mechanism of homeostasis whereby a change in the body triggers a response to counteract the change?
A. Negative feedback
B. Positive feedback
C. Negative response
D. Positive response
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Ответ:
Explanation:
As given,
Allele A for blue anthocynin.
aa for yellow kernel;
at second locus;
W produce smooth kernel,
ww for wrinkled kernel;
Parents as given are: AaWw and aaww
Progeny are:
blue smooth ( AaWw)= 1447;
blue wrinkle (Aaww)= 169;
yellow smooth (aaWw)= 186;
yellow wirnked (aaww)= 1510
a)
Recombinant progeny are 169+ 186= 355
non- recombinant progeny are = 1447+ 1510= 2957
so recombination frequency (RF)= 346/2957×100= 12.0054%
So a and w are linked genes.
They are 12 mu far away from each other.
b) Blue smooth parent= AaWw.
c) Aaww crossed with aaWw
progeny are= AaWw, Aaww, aaWw, aaww,
They all are produced in same proportion =0.25% or 1/4.