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)

Question

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