Question

in pea plants, tallness is dominant to short. tell the phenotype (tall or short) associated with each of the following genotypes: tt tt tt

Explanation:

Step1: Understand dominant - recessive concept

In genetics, a dominant allele is expressed in the phenotype even when a recessive allele is present. A recessive allele is only expressed when there are two copies of it.

Step2: Analyze TT genotype

Since tallness (T) is dominant, the genotype TT has two dominant alleles. So the phenotype is tall.

Step3: Analyze Tt genotype

The genotype Tt has one dominant (T) and one recessive (t) allele. The dominant allele determines the phenotype, so the phenotype is tall.

Step4: Analyze tt genotype

The genotype tt has two recessive alleles. Since there is no dominant allele, the recessive trait is expressed, so the phenotype is short.

Answer:

TT: tall
Tt: tall
tt: short