Question

In pea plants, smooth seeds (S) are dominant over wrinkled seeds (s). What is the expected genotypic ratio in the offspring of a cross between two heterozygous individuals?(1 point)
Responses

1SS: 2Ss: 1ss
1SS: 2Ss: 1ss

1SS: 1Ss
1SS: 1Ss

3SS: 1ss
3SS: 1ss

1Ss: 1ss

Answer 1

In a cross between two heterozygous individuals (Ss x Ss), you can use a Punnett square to determine the expected genotypic ratio of the offspring.

The possible gametes from each parent are:
- From the first parent (Ss): S and s
- From the second parent (Ss): S and s

Setting up the Punnett square:

```
S s
----------------
S | SS | Ss |
----------------
s | Ss | ss |
----------------
```

From the Punnett square, the genotypes of the offspring are:
- 1 SS
- 2 Ss
- 1 ss

Therefore, the expected genotypic ratio is:
**1SS : 2Ss : 1ss**

So, the correct response is:
**1SS: 2Ss: 1ss**