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Unit 8 Preparation (299.0K)

1			Alleles are
			A)	identical genes.
			B)	altered from one generation to the next.
			C)	found only in reproductive cells
			D)	alternative forms of a particular gene.
2			A recessive allele
			A)	is only expressed in a homozygous form.
			B)	is only expressed in a heterozygous form.
			C)	cannot be inherited.
			D)	can only combine with another recessive allele.
3			If two alleles at a locus are identical, the individual organism is
			A)	homozygous.
			B)	heterozygous.
			C)	an identical twin.
			D)	dominant.
4			The alleles in an individual organism
			A)	change over time.
			B)	can be determined by the individual's appearance.
			C)	are inherited from one parent only.
			D)	remain unchanged throughout life.
5			The physical traits of an organism are its
			A)	genotype.
			B)	alleles.
			C)	phenotype.
			D)	genes.
6			A recessive allele is
			A)	only expressed in the homozygous form.
			B)	never inherited.
			C)	never found in the heterozygous form.
			D)	a mutation.
7			If you crossbreed two heterozygous pea plants, both having the alleles Ww, the offspring will be
			A)	all Ww.
			B)	25% Ww, 25% ww, 50% WW.
			C)	50% Ww, 25% ww, 25% WW.
			D)	50% ww, 50% WW.
8			In a pair of alleles
			A)	one allele is always dominant.
			B)	one allele is always recessive.
			C)	both must be either dominant or recessive.
			D)	neither may be dominant.
9			A population is
			A)	a group of species of organisms living in the same geographic area at the same time.
			B)	a group of individuals of the same species living in the same geographic area at the same time.
			C)	a group of individuals of varying species living in the same geographic area at the same time.
			D)	a group of individuals of the same species.
10			If you breed a dog with the alleles DD for a trait with a dog having the alleles dd, the offspring will be
			A)	all DD.
			B)	all dd.
			C)	all Dd.
			D)	25% DD, 25% dd, 50% Dd.