Test Review: Reproduction,Heredity, & DNA

During _______________, sperm and egg unite to form offspring.

• Pollination

• Mitosis

• Fertilization

• Meiosis

A(n) _______________ is an example of a haploid cell because it contains half the number of chromosomes.

• Body cell

• Daughter cell

• Sex cell

• Diploid cell

Sex cells are formed during _______________, when the nucleus divides twice, forming cells with half the original chromosome number.

• Mitosis

• Fertilization

• Meiosis

• Pollination

There are 38 chromosomes in the liver cells of a cat. The sperm of male cats would contain ________ chromosomes.

• 38

• 19

• 24

• 56

Homologous chromosomes ________ during meiosis and _______ during fertilization.

• separate, pair

• pair, separate

• replicate, divide

A fertilized human egg contains ______ chromosomes.

• 23

• 46

• 92

A(n) _____ is always expressed if it is present in an organism.

• genotype

• phenotype

• dominant allele

• recessive allele

A(n) _____ is a unit on a chromosome that determines traits.

• DNA

• gene

• genotype

• Phenotype

The organism's ________ can't be seen because it is the actual alleles of a gene that the organism contains.

• genotype

• phenotype

• dominant alleles

• recessive alleles

A(n) ________ is only expressed in an organism if no dominant allele is present.

• genotype

• phenotype

• dominant allele

• recessive allele