This is biomedical science btw What are some actions or activities that can affect your heart rate and respiratory rate and cause either or both of them to increase or decrease

The cluster of developing cells from conception until birth is called an

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?

Give an example of a trait that is controlled by more than one gene.