A nurse is caring for a child with Rheumatic fever (Rheumati…

A nurse is caring for a child with Rheumatic fever (Rheumatic heart disease). When obtaining the child’s medical history from the parent, the nurse should recognize the significance of which of the following data as the possible source of the child’s infection?

In cats, black fur color is caused by an X-linked allele; th…

In cats, black fur color is caused by an X-linked allele; the other allele at this locus causes orange color.  The heterozygote is tortoiseshell (black and orange).  What kinds of offspring would you expect from the cross of a black female and an orange male?