GEOLOGY Please help, need to turn it. Summarize the relationship between the composition, temperature, and volatile content of magmas and effusive vs. explosive eruptions.

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?