What is the expected phenotypic ratio for a cross between two individuals that are heterozygous for...

What is the expected phenotypic ratio for a cross between two individuals that are heterozygous for a given trait? Use one of Mendel's pea plant traits as an example.

Expert Solution

What is the expected phenotypic ratio for a cross between two individuals that are heterozygous for a given trait?

Heterozygous for a trait means that the individual has one dominant allele and one recessive allele for the trait. Example- Tt can be an example, in this case, T is dominant and t is recessive.

Homozygous trait means that the individual has two copies of either dominant allele or two copies of recessive alleles. Example- TT or tt.

Let's take an example of the height of the pea plant. Allele T is dominant and will produce a tall progeny. Even a single copy of the T allele is enough to a tall pea plant. t allele is recessive and two copies t is needed to make plant dwarf.

Two individuals that are heterozygous for a given trait

Individual 1 - Tt

Individual 2 - Tt

	T	t
T	TT	Tt
t	Tt	tt

phenotypic ratio - 3:1

Three individuals are tall and one is Dwarf.

Genotypic ratio- 1:2:1

TT:Tt:tt

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gladiator answered 3 hours ago

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