Meiosis

The reduction of the chromosome number during meiosis is most important for

• keeping the amount of DNA in the cell at minimum level
• allowing the growth of the cell without increasing the DNA content
• maintaining the chromosome number during sexual reproduction
• preventing the nucleus from becoming larger with each cell division

Gametes must be haploid becase

• fertilization results in a haploid zygote
• the gametes' chromosomes will be replicated prior to cell division
• two gametes will unite during fertilization to create a diploid cell
• gametes are small and can hol doly the haploid number of chromosomes

During meiosis, homologous chromosomes can exchange DNA in a process known as

• internal fertilization
• crossing over
• cytokinesis
• replication

Why does sexual reproduction result in greater diversity among offspring than does asexual reproduction?

• mutations are more likely to occur in asexual reproduction
• new combinations of genes result from sexual reproduction
• sexual reproduction may occur at a faster rate
• only mitosis must occur in sexual reproduction

the jimsonweed Daltura stramonium normally has 12 chromosomes in the body cells. How many chromosomes will an egg cell of the weed have?

• 18
• 24
• 6
• 12

The processes of meiosis and fertilization help ensure the survival of the species by providing each generation with the same number of 

• chromosomes
• offspring
• body cells
• gametes

The process that results in 2, diploid cells is

• mitosis
• meiosis

The process that results in 4, haploid cells is

• mitosis
• meiosis

Gametes have one set of chromosomes and therefore are called

• haploid cells
• diploid cells

Body cells have two sets of chromosomes and therefore are called 

• haploid
• diploid