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Exam 2: Chromosomes and Cellular Reproduction

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Question 31

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Three primary oocytes can lead to _____ eggs while three secondary spermatocytes can lead to _____ sperm.

A) 12; 9
B) 3; 3
C) 3; 6
D) 6; 12
E) 6; 6

F) A) and B)
G) B) and E)

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Question 32

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List two differences and two similarities between mitosis and meiosis.

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Differences: (1)Mitosis occurs in somati...

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Question 33

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What events during sexual reproduction are significant in contributing to genetic diversity?

Which of the following does NOT occur during the G₂ phase of the cell cycle?

What evidence is there that viruses evolved after, not before, cells?

The complex of DNA and histone proteins that makes up the eukaryote chromosome is called:

In order to be functional, a eukaryotic chromosome requires all of the following EXCEPT:

Explain why mitosis does not produce genetic variation and how meiosis leads to the production of tremendous genetic variation.

A dividing eukaryotic cell is treated with a drug that inhibits the activity of the spindle-attachment checkpoint.At which cell cycle stage would you predict that the cell would be blocked?

What process is unique to plants?

Describe the difference between the centromere and kinetochore.

The cells illustrated below belong to a species with a diploid chromosome number of four.Which stage of mitosis or meiosis is each cell in?

What is the type of chromosome where the centromere is located in the middle of the chromosome producing arms of equal length?

What is the special class of proteins that is associated with the DNA of eukaryotic chromosomes and forms a complex called chromatin?

During prophase I of meiosis, crossing over is indicated by what microscopically visible structure?

What is one feature of meiosis that produces genetic variability in gametes? In two or three sentences, explain how this feature causes genetic uniqueness.

Pea plants have seven different pairs of chromosomes.A nucleus in the pea endosperm contains how many chromosomes?

Describe the difference between meiosis I and meiosis II.

Describe the difference between homologous chromosomes and sister chromatids.

In the life cycle of a higher plant (angiosperm) , the female part of the flower undergoes meiosis and directly produces: