Question

when is a recessive trait capable of expressing itself?Write its expression with respect to height of plant.(genotype)

Answer 1

Ans: A recessive trait can be defined as the trait which is expressed only when the recessive alleles are present in a homozygous condition

Answer 2

Answer:

A recessive trait can express itself only when both the alleles( in a homologous pair) carry the recessive genes.

Explanation:

With respect to the height of a plant( tall height is a dominant character)

Say T- Dominant allele, t- Recessive allele

So, Genotype: TT, Tt

Phenotype-Tall plants

Since the dominant allele is present, the recessive trait( short height) can't be expressed.

Only when it is tt, the recessive trait can be expressed and the plant height is short.