BIOS 105 Exam 4 - is an appropriate description of its contents? ...

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BIOS 105 Exam 4

• If a cell has completed meiosis I and is just beginning meiosis II, which of the following

is an appropriate description of its contents?

• It has half the amount of DNA as the cell that began meiosis.
• It has the same number of chromosomes, but each of them has different alleles than

another cell from the same meiosis.

• It has half the chromosomes but twice the DNA of the originating cell.
• It has one-fourth the DNA and one-half the chromosomes as the originating cell.
• It is identical in content to another cell formed from the same meiosis I event.:

Answer A) It has half the amount of DNA as the cell that began meiosis.

• After telophase I of meiosis, the chromosomal makeup of each daughter cell is .
• diploid, and the chromosomes are each composed of a single chromatid
• diploid, and the chromosomes are each composed of two chromatids
• haploid, and the chromosomes are each composed of a single chromatid
• haploid, and the chromosomes are each composed of two chromatids

E) tetraploid, and the chromosomes are each composed of two chromatids:

Answer D) haploid, and the chromosomes are each composed of two chromatids

• 3Sister chromatids separate from each other during .
• mitosis only
• meiosis I only
• meiosis II only
• mitosis and meiosis I

E) mitosis and meiosis II:

Answer E) mitosis and meiosis II

• Independent assortment of chromosomes occurs during .
• mitosis only
• meiosis I only
• meiosis II only
• mitosis and meiosis I

E) mitosis and meiosis II:

Answer B) meiosis I only

• Which of the following occurs in meiosis but not in mitosis? 1 / 2

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• chromosome replication
• synapsis of chromosomes
• production of daughter cells
• alignment of chromosomes at the equator

E) condensation of chromosomes:

Answer B) synapsis of chromosomes

• Crossing over normally takes place during which of the following processes?
• meiosis II

• meiosis I
• mitosis

D) mitosis and meiosis II:

Answer B) meiosis I

• The egg of a fruit fly has 4 individual chromosomes. How many chromo- somes are in a

somatic cell of a fruit fly?

• 4
• 2
• 8

D) 16:

Answer C) 8

• If meiosis produces haploid cells, how is the diploid number restored for those organisms

that spend most of their life cycle in the diploid state?

• DNA replication
• reverse transcription
• synapsis

D) fertilization:

Answer D) fertilization

• What makes sexually reproduced offspring genetically different from their parents?
• genetic recombination during meiosis
• genetic recombination during mitosis
• crossing over during mitosis

D) Sexual reproduction does not produce genetically different offspring.:

Answer A) genetic recombination during meiosis

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