Two phenotypically normal mice produce a single f1 male progeny that is also phenotypically normal. this f1 male is mated with an igf2/igf2 female and ½ of the progeny are dwarf. where did the igf2m allele in the f2 progeny originate?

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Which could be a pathway of food through an ecosystem

Every early childhood education program should develop a