Question

You and your colleagues are constructing a pedigree for a boy with cystic fibrosis. The individual’s younger brother has also been diagnosed with cystic fibrosis. How would these brothers be represented in a pedigree?
Question 10 options:

Both would be represented as completely shaded circles.

Both would be represented as completely shaded squares.

The older brother would be a shaded square, while the younger brother would be a half-shaded square.

Both would be represented as unshaded squares.

Answer 1

Answer:

The correct option is B) Both would be represented as completely shaded squares.

Explanation:

A pedigree can be described as a chart or a diagram which reflects the occurrence of a particular phenotype from one generation to another in a family. It determines the family history for a trait.

In a pedigree, males are usually drawn as squares. A male who is carrying a disorder or a particular phenotype under study is represented by shading the square. A male who is a carrier for the trait under study is represented by lines on the square. Hence, option B is correct.