Help with number 8 What is the maximum number of Barr bodies

What is the maximum number of Barr bodies in the human cells with the following chromosome composition: XYY XX XXY XXX A Drosophila experiment was conducted and is shown. How many genes are involved? What are they? How many traits are involved?

Solution

1. Maximum number of bar bodies

since we know that bar bodies is the inactive X chromosomes in the female somatic cells

XYY = no bar bodies in it since only one active X chromosome is present

XX = one bar body

XXY = 1 bar body

XXX =2 bar bodies present in it