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12 Questions

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Sexual Life Cycles and Cell Division

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Questions and Answers

What is the term for the process by which homologous chromosomes become closely associated with each other during prophase I of meiosis I?

Mitosis

Fertilization

Genetic recombination

Synapsis (correct)

What is the term for the site where genetic recombination (crossing over) occurs during synapsis?

Tetrad

Synaptonemal complex

Chiasmata (correct)

Homologue

What is the result of Meiosis I?

Two haploid cells (correct)

Four diploid cells

Four haploid cells

Two diploid cells

What is the characteristic of meiosis that distinguishes it from mitosis?

Two rounds of cellular division Signup and view all the answers

What is the dominant phase in mammals?

Diploid phase Signup and view all the answers

What is the result of fertilization?

One diploid cell Signup and view all the answers

What is the result of crossing over between non-sister chromatids in meiosis?

Genetic recombination Signup and view all the answers

What is the consequence of nondisjunction during meiosis?

Gametes with an abnormal number of chromosomes Signup and view all the answers

What is unique to prophase I in meiosis?

Synapsis Signup and view all the answers

What is the result of meiosis in animals?

4 cells that develop directly into gametes Signup and view all the answers

What occurs during anaphase I in meiosis?

Homologues separate Signup and view all the answers

What is the significance of meiosis in evolution?

It introduces genetic variation Signup and view all the answers