In pea plants, green pods are dominant to yellow pods and round seeds are dominant to wrinkled seeds. If a plant that is heterozygous for green pods and has wrinkled seeds is crossed to a plant that has yellow pods and is heterozygous for round seeds, what is the probability of getting an offspring that has yellow pods and wrinkled seeds?

Question

Biology

Morgan Peterson

19 September, 00:12

In pea plants, green pods are dominant to yellow pods and round seeds are dominant to wrinkled seeds. If a plant that is heterozygous for green pods and has wrinkled seeds is crossed to a plant that has yellow pods and is heterozygous for round seeds, what is the probability of getting an offspring that has yellow pods and wrinkled seeds?

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Jaycee Branch · Answer 1

25% of the probabillity

To know what's happened here, we need to draw a Punnett square crossing both characteristics at the same time.

First, we need to identify the alleles:

Green is dominant over yellow: G and y

Rounded is dominant over wrinkled: R and w

So, if we have a plant that is heterozygous for green pods and has wrinkled seeds (Gy ww) is crossed to a plant that has yellow pods and is heterozygous for round seeds (yy Rw) its offsprings will be:

1/4 green round: Gy Rw

1/4 yellow round: yy Rw

1/4 green wrinkled: Gy ww

1/4 yellow wrinkled: yy ww