Question

in pea plants tall dominate short. which of the following would be the most accurate representation of a population of 1000 pea plants produced by crossing a homozygous tall with a homozygous short?
○ 750 tall plants and 250 short plants
○ 500 tall plants and 500 short plants
○ 1000 tall plants
○ 1000 short plants

Explanation:

Step1: Recall Mendelian Genetics

In pea plants, let the allele for tall be \( T \) (dominant) and short be \( t \) (recessive). A homozygous tall plant has genotype \( TT \), and a homozygous short has \( tt \).

Step2: Determine Offspring Genotype

When crossing \( TT \) (homozygous tall) with \( tt \) (homozygous short), all offspring will have the genotype \( Tt \) (since \( T \) from tall and \( t \) from short).

Step3: Phenotype of Offspring

Since \( T \) is dominant over \( t \), the phenotype of \( Tt \) is tall. So all 1000 plants (offspring) will be tall.

Answer:

1000 Tall plants