FREE BIOLOGY AND STUDY GAMES ABOUT MEIOSIS

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SEXUAL R. EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -59 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: 9.List and define the three life cycles of sexually reproducing organisms.

Answer:

Haplontic dominant, diplontic dominant, alternation of generations

Question 2: 38. Def of reduction division

Answer:

second round of meiotic cell division following meiosis I; sister chromatids are separated into individual chromosomes, and the result is four unique haploid cells

Question 3: 40. Def of spore

Answer:

nuclear division that produces daughter nuclei each having one-half as many chromosome sets as the parental nucleus; meiosis I is a reduction division

Question 4: 53. Def of genetic recombination

Answer:

exchange of genes between two DNA molecules to form new combinations of genes on a chromosome.

Question 5: 16. At metaphase I, homologous chromosomes are connected only at what structures?

Answer:

Synapses

Question 6: 49. Def of gametes

Answer:

organism's reproductive cells.

Question 7: 30. Def of Crossover

Answer:

exchange of genetic material between nonsister chromatids resulting in chromosomes that incorporate genes from both parents of the organism

Question 8: 33. Def germ cells

Answer:

specialized cell line that produces gametes, such as eggs or sperm

Question 9: 36. Def of meiosis II

Answer:

a nuclear division process that results in four haploid cells

Question 10: 34. Def of meiosis

Answer:

a nuclear division process that results in four haploid cells Question 11: 22. Hydras and jellyfish both live in a freshwater lake that is slowly being acidified by the runoff from a chemical plant built upstream. Which population is predicted to be better able to cope with the changing environment?

Answer:

• Jellyfish

• Hydra

• The populations will be equally able to cope.

• Both populations will die.

Question 12: 5.What is happening during each step of meiosis I and meiosis II? List and describe.

Answer:

Prophase, Metaphase, Anaphase, Telophase

Question 13: 35. Def meiosis I

Answer:

first round of meiotic cell division; referred to as reduction division because the ploidy level is reduced from diploid to haploiddiffercne Question 14: 23. Many farmers are worried about the decreasing genetic diversity of plants associated with generations of artificial selection and inbreeding. Why is limiting random sexual reproduction of food crops concerning?

Answer:

a.Mutations during asexual reproduction decrease plant fitness.b.Consumers do not trust identical-appearing produce.C.Larger portions of the plant populations are susceptible to the same diseases

• Spores are not viable in an agricultural setting.

Question 15: 19.If a muscle cell of a typical organism has 32 chromosomes, how many chromosomes will be in a gamete of that same organism?

Answer:

16

Question 16: 18.The part of meiosis that is similar to mitosis is ________.

Answer:

meiosis ii( making two new cells)

Question 17: 50. Def of karyotype

Answer:

individual's complete set of chromosomes.Question 18: 20.What is a likely evolutionary advantage of sexual reproduction over asexual reproduction?

Answer:

• Sexual reproduction involves fewer steps.

• There is a lower chance of using up the resources in a given environment.

• Sexual reproduction results in variation in the offspring.

• Sexual reproduction is more cost-effective.

Question 19: 27. Def alternation of generations

Answer:

life-cycle type in which the diploid and haploid stages alternate

Question 20: 60. Def of life cycle

Answer:

the sequence of events in the development of an organism and the production of cells that produce offspring Question 21: 10.How does sexual reproduction differ between animals, fungi, algae, and plants?

Answer:

A plant embryo is contained within a seed, which provides the nutrients it needs to grow, while an animal embryo develops within an egg.

Question 22: 7.Why is reduction of chromosomes necessary in meiosis?

Answer:

type of cell division that reduces the number of chromosomes in the parent cell by half and produces 4 gametes cells.

Question 23: 45. Def of reduction division

Answer:

all the cells of a multicellular organism except the gametes or reproductive cells

Question 24: 55. Def methods of increasing genetic diversity

Answer:

a way for populations to adapt to changing environments

Question 25: 51. Def of gonads

Answer:

glands that produce hormones that are involved in reproduction and other functions of the body.