What is the primary source of all current environmental issues? O A. Lack of resources
B. Human overpopulation
C. Deforestation
D. Greenhouse gases

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?

Several billion years ago which gas was the least prevailant in the atmosphere

Can a trait be both polygenic and have multiple alleles? explain why or why not.