In short homed cattle, genes for red and white coats occur. Crosses between a red (RR) and a white () produce an offspring whose coat appears a reddish-gray or roan color. A roan cow mates with a white bullWhat be the phenotypes of the offspring?

The function of the excretory system is to control homeostasis and

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population.b) the separated population is small, and genetic drift occurs.c) the isolated population is exposed to different selection pressures than the ancestral population.d) different mutations begin to distinguish the gene pools of the separated populations.e) gene flow between the two populations is extensive.

How do the sperm cells get from the stigma to the ovules?