Color blindness is a recessive sex-linked human trait. If a color-blind father
and a mother with normal color vision have six sons with normal color vision,
what is most likely to be the mother's genotype?
O A. XNXn
B. YN YN
C. XNY
O D. XNyn
SUBMIT
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The cluster of developing cells from conception until birth is called an

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Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content