Quiz Review 5.1 & 5.2

The production of egg and sperm cells is necessary for sexual reproduction because —

• it increases the number of chromosomes so that the gametes can combine, giving the organism a complete set of chromosomes

• it increases the number of developing offspring

• it decreases the number of developing offspring

• it reduces the number of chromosomes so the gametes can combine, giving the organism a complete set of chromosomes

Which of the following best describes the process that diagram 2 represents?

• cell division that occurs in reproductive structures of an organism

• cell division that occurs in the repair process of damaged skin cells

• occurs in all cells of the body system

• process prior to the first stage of cell division

Which of the following could result if meiosis did not occur in the process of sexual reproduction?

• Chromosomes would no longer contain genetic information.

• Chromosome number would increase with each generation.

• Chromosomes would not be copied exactly.

• Chromosome number would decrease with each generation.

There are a total of _______ chromosomes in human sperm or egg cells.

• 2

• 23

• 46

• 92

There are _______ cells produced in meiosis.

• 2

• 4

• 1

A diploid cell has 12 chromosomes. How many chromosomes does the haploid cell of that organism have?

• 6

• 12

• 24

Gametes must be haploid because-

• gametes are small and can hold only the haploid number of chromosomes

• the gametes chromosomes will be replicated prior to cell division

• two gametes will unite during fertilization to create a diploid cell

• fertilization results with a haploid zygote

What describes the physical appearance of a trait?

• allele
• genotype
• phenotype
• karyotype

If alleles look like Aa in a genotype it is said to be

• homozygous
• heterozygous
• incomplete dominant
• codominant 

If alleles look like AA in a genotype it is said to be

• homozygous
• heterozygous
• incomplete dominant
• codominant