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You have observed that genetic variance is equal to 4.0 and phenotype variance is equal to...

You have observed that genetic variance is equal to 4.0 and phenotype variance is equal to 8.0. Calculate the heritability of this trait. Based on your answer, what can you say about the heritability of this trait? Thank you in advance.

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Answer #1

Heritability is a proportion that is derieved by calculating the difference between the genetic variance to the phenotype variance. Heritability ranges between the values 0-1.

A high heritability value that is close to 1 means that the variation in a given trait is due to genotype variation only . And a low heritability value that is close to 0 means that the variation is not due to genotype / genetic.

For estimating the human behaviour, the heritability estimate will be in the range between 0.30 - 0.60.

Here , the genetic variance is equal to 4.0 and phenotype variance is equal to 8.0

Heritability = H2 = Vg / Vp

= 4.0 / 8.0

= 0.50

Here, the heritability estimate is 0.50

This value means that about 50% ot the variation that is observed in this trait is due to the genotype/ genetic variation.

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