All  combination are possible for the gametes of an organism that is AaBb except:

Huntington’s disease is an autosomal dominant condition where defective proteins kill brain cells. A man with Huntington’s whose mother did not have it has a son with a woman who also does not have it. What is the chance the son will have Huntington’s?

A man who carries a harmful sex-linked (on the X chromosome) gene will pass the gene on to:

DNA wraps around _______________ proteins to compact it to a 30 nm thickness, which fits inside the nucleus.

A recessive allele is one:

Matt is normally pigmented but has an albino son.  Matt is ____________ for this trait.

After mitotic cell division, if a parent cell has 8 chromosomes, each daughter cell will have ______chromosomes.

This autosomal recessive condition is caused by a defective enzyme that produces the pigment melanin.

In snakes, the albino condition is recessive to normal pigmentation.  An albino female snake mates with a normally pigmented male snake. Their offspring are: 3  normally pigmented: 1 albino   What is the genotype of the male parent snake?

In pea plants, inflated pod is dominant to wrinkled pod.  A homozygous inflated pea plant is crossed with a wrinkled pea seed plant. What would be the expected phenotypic ratio of the F2 generation?