(B) In polygenic inheritance involving $n$ pairs of genes,the proportion of offspring resembling either extreme parent in the $F_2$ generation is give

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(B) In polygenic inheritance involving $n$ pairs of genes,the proportion of offspring resembling either extreme parent in the $F_2$ generation is given by the formula $(1/4)^n$.Here,the number of gene pairs $n = 3$.Therefore,the proportion of offspring resembling the parents ($AABBCC$ or $aabbcc$) is $(1/4)^3 = 1/64$.Since $1/64$ is approximately $0.0156$,which is $1.56\%$,this value is less than $5\%$.

Class 12 Biology Principles of Inheritance and Variation Polygenic inheritance

Medium

The kernel color of wheat is determined by three pairs of polygenes. In a cross between $AABBCC$ (dark color) and $aabbcc$ (light color),what will be the proportion of $F_2$ progeny having a kernel color similar to either of the two parents?

A
None
B
Less than $5\%$
C
One-third
D
Half

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Class 12

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Chapter

Principles of Inheritance and Variation

Subtopic

Polygenic inheritance

Which scientist demonstrated that skin color in humans exhibits polygenic inheritance?

Easy

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It is easier to study polygenic inheritance of characters in plants than in animals because in plants:

Medium

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Which of the following traits is controlled by more than one gene?

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In a plant,the weight of fruits is determined by the number of dominant alleles for several genes. If seven categories of weight are obtained,how many loci are involved in this trait?

Medium

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In tomatoes,a plant with the genotype $aabbcc$ produces $100 \,g$ tomatoes,and a plant with the genotype $AABBCC$ produces $160 \,g$ tomatoes. What is the contribution of each polygene to the tomato weight (in $,g$)?

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The kernel color of wheat is determined by three pairs of polygenes. In a cross between $AABBCC$ (dark color) and $aabbcc$ (light color),what will be the proportion of $F_2$ progeny having a kernel color similar to either of the two parents?

Similar Questions

Which scientist demonstrated that skin color in humans exhibits polygenic inheritance?

It is easier to study polygenic inheritance of characters in plants than in animals because in plants:

Which of the following traits is controlled by more than one gene?

In a plant,the weight of fruits is determined by the number of dominant alleles for several genes. If seven categories of weight are obtained,how many loci are involved in this trait?

In tomatoes,a plant with the genotype $aabbcc$ produces $100 \,g$ tomatoes,and a plant with the genotype $AABBCC$ produces $160 \,g$ tomatoes. What is the contribution of each polygene to the tomato weight (in $,g$)?

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