What percentage of homozygous $Rh^{-}$ children will be born to a couple where the husband is heterozygous for $Rh^{+}$ and the wife is homozygous for $Rh^{-}$ (in $, \%$)?

What will be the ratio of heterozygous,homozygous,and hemizygous color blindness in the offspring of a color-blind husband and a carrier wife?

How many sentences are correct?
$(i)$ Every gene contains the information to express a particular trait.
$(ii)$ Gene responsible for $\beta$-thalassemia is present on the $11^{th}$ pair of autosomal chromosomes.
$(iii)$ Mendel's approach of using mathematics to explain biological phenomena was totally new and unacceptable to many of the biologists of his time.

What is $HbA_2$ composed of?

In maize, albinism is caused by the effect of:

In what context does an epistatic gene differ from a dominant gene?