Question 1

(Essay)

Assume that you have a garden and some pea plants have solid leaves and others have striped leaves. You conduct a series of crosses [(a) through (e)] and obtain the results given in the table. Define gene symbols and give the possible genotypes of the parents of each cross.
 Cross  progeny
     solid  sriped
 a  solid × sriped  55  60
 b  solid ×solid  36  0
 c  sriped × sriped  0  65
 d  solid ×solid  92  30
 e  solid × sriped  44  0

Answer

(a) From cross (d), assume that solid (S) is dominant to striped (s): Ss × ss. (b) SS × SS or SS × Ss (c) ss × ss (d) Ss × Ss (e) SS × ss