Cross a male TTBb x with a female TtBb. How many gamete combinations do they have?

Which of the following examples can cause gene flow between populations? a.an increase in predators to a population of zebra b.a volcanic eruption that kills half of a population of mice c.bird droppings that contain seeds from a different location d.a person that sprays a toxin on a group of mosquitoes

Environmental impacts on evolution : mastery test

What makes a dominant allele different from a recessive allele