Grain colour in wheat is determined by three | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Grain colour in wheat is an example of polygenic inheritance involving $3$ gene pairs $(n = 3)$.In the $F_2$ generation of a trihybrid cross,the t

Vedclass · Accepted Answer

Less than $5$ per cent

Vedclass · Answer

(B) Grain colour in wheat is an example of polygenic inheritance involving $3$ gene pairs $(n = 3)$.In the $F_2$ generation of a trihybrid cross,the total number of possible combinations is $4^n = 4^3 = 64$.The parental phenotypes (extreme phenotypes) are represented by the genotypes $AABBCC$ (darkest) and $aabbcc$ (lightest).The proportion of individuals resembling either parent is given by the formula $(1/4)^n$.Substituting $n = 3$,we get $(1/4)^3 = 1/64$.Since $1/64$ is approximately $0.0156$,which is $1.56\%$,this value is less than $5\%$.

Grain colour in wheat is determined by three pairs of polygenes. Following the cross $AABBCC$ (dark colour) $\times$ $aabbcc$ (light colour),in $F_2$ generation,what proportion of the progeny is likely to resemble either parent?

Similar Questions

What is the pattern of inheritance for a polygenic trait?

$A$ characteristic showing continuous variation is controlled by a

The phenotype of one parent for skin colour is $AABBCC$ and the other parent is $aabbcc$. What will be the skin colour and genotype for their progeny?

In human beings,multiple genes are involved in the inheritance of

Polygenic inheritance is observed in which of the following?

Vedclass Test Series

Exam Paper Generator

Online Exam Module