Final answer:
When a homozygous tall pea plant (TT) is crossed with a heterozygous tall plant (Tt), all offspring will be tall. The correct answer is (3) 100% tall.
Step-by-step explanation:
The question relates to Mendelian inheritance in the field of biology. In this specific case, a homozygous tall pea plant (TT) is being crossed with a heterozygous tall plant (Tt). A homozygous tall plant has two dominant tall alleles (TT), while a heterozygous tall plant has one tall allele (T) and one dwarf allele (t).
According to Mendel's laws, in the resulting offspring:
- Tt (tall, from one dominant allele and one recessive from the heterozygous parent)
- TT (tall, from one dominant allele from each parent)
So in simple terms, we will have 100% tall progeny - hence the correct answer would be (3) 100% tall.
Learn more about Mendelian inheritance