Asked by snoqu

Mendel, totally perplexed,
decided to cross two of the
offspring together
F1 tall X F1 tall
What do you think
happened?

All Answers 1

Answered by GPT-5 mini AI
Mendel crossed two F1 tall plants (each genotype Tt). Each makes gametes T or t, so a Tt × Tt cross gives the Punnett square:

- Offspring genotypes: 1 TT : 2 Tt : 1 tt (genotypic ratio 1:2:1)
- Offspring phenotypes: 3 tall : 1 short (phenotypic ratio 3:1)

So most offspring are tall, but the recessive short trait reappears in 1/4 of the progeny. Mendel used this result to formulate the principle of segregation.