Select all that apply. A plant with yellow, inflated seed pods is crossed with i

ID: 213364 • Letter: S

Question

Select all that apply. A plant with yellow, inflated seed pods is crossed with itself. Of the resulting progeny, 91 have yellow, inflated pods; 32 have yellow, constricted pod; 29 have green, inflated pods; and 10 have green, constricted pods. You can safely conclude that:

Yellow pod color is dominant to green, while inflated pod shape is dominant to constricted.

There are two genes involved, one that codes for pod color, and another that codes for pod shape.

The gene for pod color is on a different chromosome than the gene for pod shape (or possibly the two genes are at opposite ends of the same chromosome).

There is only one gene involved, that affects both pod color and shape.

Yellow pod color is dominant to green, while inflated pod shape is dominant to constricted.

There are two genes involved, one that codes for pod color, and another that codes for pod shape.

The gene for pod color is on a different chromosome than the gene for pod shape (or possibly the two genes are at opposite ends of the same chromosome).

There is only one gene involved, that affects both pod color and shape.

Explanation / Answer

It is given that;

91 have yellow, inflated pods

32 have yellow, constricted pods

29 have green, inflated pods

10 have green, constricted pods.

If we take the ratios of these numbers i.e 91:32:29:10 or 9.1:3.2:2.9:1 (divide throughout by 10), we see that the ratio is close to the Mendel's dihybrid ratio i.e 9:3:3:1 derived from dihybrid cross.

Dihybrid cross involves analysis of two independent traits and follows Law of Independent Assortment in which the gene pairs assort independently and bear no association with a particular character at the time of gametogenesis.

From the above given options, only the first three can be concluded for the given question.

Yellow pod is dominant to green , while inflated pod is dominant to constricted so dominant are obtained in highest number(91) while recessive in least number(1).

Two genes are invoved as this is a dihybrid cross.

The gene are present on a different chromosome or at opposite ends of the same chromosome to rule out any linkage.

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Select all that apply. A plant with yellow, inflated seed pods is crossed with i

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