Question

The genotypic variance of the F1 progeny of a cross between two inbred lines equals

A. the total phenotypic variance.
B. the environmental variance.
C. 0.
D. 1.
E. None of the above

Answer 1

The genotypic variance of the F1 progeny of a cross between two inbred lines is 0.

Step-by-step explanation:

The genotypic variance of the F1 progeny of a cross between two inbred lines equals C. 0.

The genotypic variance refers to the genetic variation among individuals in a population. In this case, since the F1 progeny are produced by crossing two inbred lines, they have the same genotype. Therefore, the genotypic variance is zero.

The total phenotypic variance (option A) refers to the variation in traits that can be attributed to both genetic and environmental factors. The environmental variance (option B) refers to the variation in traits that can be attributed solely to environmental factors. Both of these options are not equal to the genotypic variance.

So, the correct answer is option C. 0.