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Exam 3: Chromosome Transmission During Cell Division and Sexual Reproduction

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Question 21

Multiple Choice

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During this phase of the cell cycle the nuclear membrane reforms around the chromosomes:

A) Metaphase
B) Prometaphase
C) Telophase
D) Anaphase
E) Prophase

F) D) and E)
G) B) and E)

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Question 22

Multiple Choice

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In a plant, which of the following is triploid (3n) ?

A) Pollen grain
B) Embryo sac
C) Seed
D) Endosperm
E) None of the answers are triploid

F) C) and E)
G) A) and C)

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Question 23

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You are performing a fruit fly cross similar to those that Morgan performed. Unfortunately, you forgot to write down the parents of your cross. You count the progeny, and find you have 40 red-eyed males, 80 red-eyed females, and 40 white-eyed males. Assuming that all genotypes from this cross should have equal survival rates, what are the genotypes of the parent flies?

Which of the following would contain genetic material that is 100% identical?

A pollen grain in a plant represents the ________.

The physical structure that is formed when two chromatids cross over is called a(n) _______.

In several mammals, including some rat and shrew species, the presence of two X chromosomes means the animal will be a female, whereas having just one X chromosome dictates maleness. This type of sex determination is most similar to:

In animals, somatic cells are ________ and germ cells are __________.

During this phase of the cell cycle the nuclear membrane starts to disassociate:

You are studying a type of cell that you don't know much about. You want to determine what organism the cell comes from. You decide to watch cell division in this plant using the appropriate cell biology tools. After some experimentation, you determine that cytokinesis in this cell is sensitive to myosin inhibitors. You are likely studying

Vincristine is a cancer chemotherapy drug. It binds to tubulin dimers, inhibiting assembly of microtubules. Where do you predict that vincristine stops the cell cycle?

You are performing a karyotype for the first time and you forget to add the colchicine. How do you predict this will affect your karyotype?

Which of the following indicates the correct order of these events?

What occurs during leptotene of prophase I?

In a species of turtles you are studying, you find that when eggs are incubated at a low temperature, the hatched turtle will be male. Eggs incubated at a high temperature yield females, and intermediate temperatures lead to both male and female offpsring. This mode of sex determination is most similar to that in

The end result of meiosis in animals is ______.

Zip1 is a protein in yeast that is required for synaptonemal complex formation. Assuming synaptonemal complexes are required for meiosis in yeast, where do you predict these cells arrest (stop progressing through meiosis) ?

A male produced from an unfertilized haploid egg is an example of what type of sex determination system?

A dipoid organism that you are studying has 17 chromosomes. How many total chromosomes are found in a somatic cell from this organism? A sperm cell? An egg cell?

Based on what you know about the biochemical composition of cells from Chapter 1 in your text book, the primary information containing building blocks of chromosomes are likely