If the defective gene for color blindness is carried on the x chromosome, and a color blind mother's 23rd pair of chromosomes carries the defect on both chromosomes, what is the likelihood that her son will have color blindness?

There us a 100 percent chance that her son will have color blindness because the son gets one of the mom's x chromosomes which will have color blindness because both of the mom's x chromosomes carry color blindness, and he only has 1 x chromosome, so he will definitely have color blindness.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

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explanation:

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