Which of the following best defines a trait that is controlled by four genes and heritability...

Which of the following best defines a trait that is controlled by four genes and heritability of H=1?

a.) multifactorial trait

b.) complex gene

c.) monogenic trait

d.) polygenic trait

e.) combinatorial trait

Expert Solution

The correct answer will be :-

(d) Polygenic trait.

The trait is controlled by 4 genes and heritability (H) = 1. Here heritability is 1 which suggests that variations in the population is due to Variation between genotypes and there is no environmental influence in the Variation.

?In a Polygenic trait, the trait is controlled by more than one gene and there is no environmental influences in the variations between genotypes.

?In case of multifactorial trait, there is involvement of both genetic and environmental factors which leads to formation of that trait. Since there shouldn't be any environmental influence, this option is incorrect.

?The monogenic trait is produced by single gene/allele but here there is involvement of 4 genes so this option is also incorrect.

? Complex gene are tightly linked group of genes and it doesn't define a trait that is Inherited by 4 genes with H= 1.

?Combinatorial trait is not a trait controlled by 4 genes and thus is also incorrect.

So (a), (b), (c), (e) are incorrect and the correct answer is (d).

gladiator answered 2 years ago

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