For different dog breeds, are pre-zygotic or post-zygotic obstacles more of an issue?

How would you describe an allele that be expressed and determines an organisms appearance? a.uncapitalized b.responsive c.recessive d.dominant

You sample a population of butterflies and find that 56% are heterozygous at a particular locus. what should be the frequency of the recessive allele in this population?

Which describes a major benefit that bioengineered technology has provided has provided to society? a. it’s application include the development of a new plastics for airplanes b. it’s application include the development of pacemakers and artificial limbs. c. it’s application include larger capacity for handheld music devices. d. it’s application include more energy-efficient fossil fuels.