In need of help, do not understand.

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?

What is the membrane that sheath of schwann cell containing cytoplasm and nucleus that encloses myelin

Light sensitivity in euglena is provided by the