Question

If dominant C and P genes are essential for the development of purple color in Lathyrus odoratus flowers, what would be the ratio of purple and white color in a cross between CcPp x ccPp
a) 3:5
b) 9:7
c) 2:6
d) 4:4

Answer 1

The flowers are white or sweet pea-coloured. The C and P qualities alone, e.g., Ccpp, ccPp, cCpp, and ccPP, give the flower white tone. In addition, the nonappearance creates a white shade of both transcendent qualities (ccpp). On the other hand, when both flowers are present, the flower tone becomes tinted (CCPp, CcPP, CCPP). Thus, the tone is the result of the reciprocal influence of the two qualities.

Complete answer:
Understudies, including Austrian priest Gregor Mendel, explored various avenues about garden pea plants (Pisum sativum) in this web lab (1822-1884). Mendel wanted to look into various options when it came to peas because they had four basic characteristics: It was shown that peas were capable of reproducing on their own (all posterity will have a similar trademark age after generation). Peas have a number of distinguishing characteristics (purple versus white flowers; round versus wrinkled seeds). Peas normally reproduce without the assistance of someone else by self-fertilization, in which dust delivered by a flower prepares eggs within a similar flower.
Below is a table of the punnett square. Since this is a supplementary gene situation, the phenotypic proportion of the cross between CcPp X ccPp will be as per the following, giving a phenotypic proportion of 3:5.
As a result, the correct answer is '3:5.'

| CP| Cp| cP| cp
---|---|---|---|---
Cp| CCPp| CCpp| CcPp| Ccpp
cp| CcPp| Ccpp| ccPp| ccpp

Note:
Pea plants were vital to Gregor Mendel's comprehension of the methods by which the attributes among guardians and posterity are acquired. He picked pea plants since they were not difficult to develop, rushed to raise and had different recognizable highlights including petal and pea.