Question
A farmer decides to cross a heterozygous tall pea plant (Tt) with a homozygous tall pea plant (TT). What percent of the offspring will most likely be tall?
a
25%
b
50%
c
75%
d
100%
a
25%
b
50%
c
75%
d
100%
Answers
GPT-4o mini
To determine the percentage of tall offspring from the cross between a heterozygous tall pea plant (Tt) and a homozygous tall pea plant (TT), we can set up a Punnett square.
- The alleles from the heterozygous parent (Tt) can contribute either T or t.
- The alleles from the homozygous parent (TT) can only contribute T.
When we set up the Punnett square, it looks like this:
```
T T
---------------
T | TT | TT |
---------------
t | Tt | Tt |
---------------
```
From the Punnett square, we can see the possible genotypes of the offspring:
- 2 TT (homozygous tall)
- 2 Tt (heterozygous tall)
All offspring (100%) will have at least one dominant tall allele (T), making them all tall.
So the answer is:
**d) 100%**
- The alleles from the heterozygous parent (Tt) can contribute either T or t.
- The alleles from the homozygous parent (TT) can only contribute T.
When we set up the Punnett square, it looks like this:
```
T T
---------------
T | TT | TT |
---------------
t | Tt | Tt |
---------------
```
From the Punnett square, we can see the possible genotypes of the offspring:
- 2 TT (homozygous tall)
- 2 Tt (heterozygous tall)
All offspring (100%) will have at least one dominant tall allele (T), making them all tall.
So the answer is:
**d) 100%**