Question

1. in pea plants, tall stems (t) are dominant over short stems (t). if a homozygous dominant tall plant is crossed with a homozygous recessive short plant, what is the genotype and phenotype of all the offspring?

Explanation:

Step1: Determine the genotypes of the parents

A homozygous dominant tall plant has the genotype \( TT \). A homozygous recessive short plant has the genotype \( tt \).

Step2: Use Punnett square for cross - \( TT\times tt \)

The gametes from the \( TT \) plant are all \( T \). The gametes from the \( tt \) plant are all \( t \). When we cross them (\( TT\times tt \)), using the Punnett square:

	\( T \)

Step3: Analyze genotype and phenotype

The genotype of all offspring is \( Tt \). Since \( T \) (tall) is dominant over \( t \) (short), the phenotype of all offspring is tall.

Answer:

Genotype: \( Tt \); Phenotype: Tall