Question

The explanation of the male tortoiseshell cat has two components: one is that it is tortoiseshell, and the other is that it is a male. The former is explained by the fact that the cat------and is--------at a fur color locus on the-------- . Because of the -inactivation mechanism of---------------in mammals, one of these chromosomes is randomly chosen for inactivation------- in a-------manner. Thus the animal is mosaic for---------gene expression, resulting in expression of one-----------fur-color allele in some cells and the other in other cells. The second component, that the cat is male, is explained by the fact the cat-----------, which contain(s) the which determines male sexual development. Thus, the XXY cat is a male that is mosaic for----------gene expression, resulting in a male tortoiseshell cat.

has two X chromosomes

has a Y chromosome

has both an X and a Y chromosome

hemizygous

homozygous

heterozygous

Y-chromosome

X-chromosome

X and the Y chromosomes

dosage compensation

gene compensation

allele compensation

early in development

late in development

cell-independent

cell-autonomous

cell-interdependent

autosomal

Y-linked

X-linked

testosterone gene

PAR

SRY