Considering the example of starch synthesis in pea seeds, which statement best describes the dominance of the B allele?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

B shows incomplete dominance over b for starch grain size.

B is completely dominant over b for all phenotypes.

B is recessive to b for seed shape.

B shows co-dominance with b for starch grain size.

answer is C.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

a single phenotype or trait. There are however instances where a single gene can exhibit multiple phenotypic expression. Such a gene is called a pleiotropic gene. The underlying mechanism of pleiotropy in most cases is the effect of a gene on metabolic pathways which contribute towards different phenotypes.

Starch grain size and shape is under the control of one gene with two alleles B and b.

B shows incomplete dominance over b for starch grain size,while for shape of seed it shows dominance.

Watch 3-min video & get full concept clarity