Question

mendel crossed homozygous tall and short plants. the law of segregation dictates that each sperm of the tall plant randomly passes down one allele for height and the eggs of each short plant also pass down one allele for height to the f1 generation seed. predict the f1 generation genotype.
if the heterozygous tall plant (tt) crosses with a heterozygous short plant (tt), then all the f1 plants become heterozygous tall plants (tt).
if the homozygous tall plant (tt) crosses with a heterozygous short plant (tt), then all the f1 plants become heterozygous tall plants (tt).
if the heterozygous tall plant (tt) crosses with a homozygous short plant (tt), then all the f1 plants become heterozygous tall plants (tt).
if the homozygous tall plant (tt) crosses with a homozygous short plant (tt), then all the f1 plants become heterozygous tall plants (tt).

Explanation:

Step1: Analyze the alleles of parents

The homozygous tall plant has alleles \(TT\), and the homozygous short plant has alleles \(tt\).

Step2: Determine gametes

The tall plant can only produce gametes with \(T\) allele, and the short plant can only produce gametes with \(t\) allele.

Step3: Calculate the F1 generation

Using the Punnett square (or simple combination), when \(T\) (from tall plant) combines with \(t\) (from short plant), the genotype of F1 generation is \(Tt\) for all offspring.

Answer:

If the homozygous tall plant (TT) crosses with a homozygous short plant (tt), then all the F1 plants become heterozygous tall plants (Tt).