Question

Genotypic and phenotypic ratio between homozygous dominant and homozygous recessive.

a) 1:1
b) 2:1
c) 1:2
d) 3:1

Answer 1

The genotypic ratio between homozygous dominant and homozygous recessive is 1:1. For example, in a cross between tall and dwarf pea plants, the genotypic ratio would be 1:2:1.

Step-by-step explanation:

The genotypic and phenotypic ratio between homozygous dominant and homozygous recessive depends on the specific inheritance pattern of the trait being considered. However, in general, if we consider a simple dominant and recessive trait, the genotypic ratio between homozygous dominant and homozygous recessive would be 1:1 (option a).

For example, if we consider a cross between two individuals that are heterozygous for a trait, such as tall (dominant allele) and dwarf (recessive allele) plants, the genotypic ratio in the offspring would be 1 homozygous dominant : 2 heterozygous : 1 homozygous recessive, which simplifies to a 1:2:1 ratio.

It's important to note that the genotypic ratio represents the ratio of different genetic combinations, while the phenotypic ratio represents the ratio of different physical traits or characteristics displayed by the offspring.