Question 1

From the list below, which choice represents a correct difference between sperm production and egg production?

Accepted Answer

C) Four mature sperm are produced from one cell through spermatogenesis, while one large egg and polar bodies are produced from one cell through oogenesis, highlighting a key difference in gametogenesis between males and females.

Question 2

Imagine you start a population of 1 million individuals from a single bacterial cell. Now imagine that a population this large is started from a male and female housefly. How would these two populations differ?

Accepted Answer

Bacterial populations, especially those started from a single cell, tend to be genetically very similar due to asexual reproduction (binary fission), whereas a housefly population started from a male and female would exhibit greater genetic diversity due to sexual reproduction.

Question 3

Assume that the starting cell or parents of the bacteria and housefly populations in the question above were well adapted to their environment. Now imagine that the populations are subjected to very different environment. How do you think these two populations may respond to the environmental change?

Accepted Answer

The answer of Assume that the starting cell or parents...

Question 4

Linked genes are more likely to be separated if they are farther apart on the chromosome.

Accepted Answer

Linked genes that are farther apart on a chromosome have a higher probability of being separated by recombination during meiosis, compared to genes that are closer together.

Question 5

A haploid cell from an organism has 20 chromosomes. How many chromosomes are in a diploid cell from the same organism? How many in a gamete from this organism?

Accepted Answer

The answer of A haploid cell from an organism has...

Question 6

A zygote develops into a whole human through the ________ division of cells.

Accepted Answer

The answer of A zygote develops into a whole human...

Question 7

Match the events with the step in meiosis in which it occurs. Steps may be used more than once or not used at all.
-Chromosomes line up with the sister chromatids on opposite sides of the metaphase plate.

Accepted Answer

During Prophase/Metaphase II of meiosis, chromosomes line up at the metaphase plate with sister chromatids oriented toward opposite poles, preparing for their separation. This does not occur in Metaphase I, where homologous chromosomes line up together.

Question 8

Suppose a researcher claims to be able to make a hybrid animal that is a cross between a human and a rhesus monkey. The normal diploid number for humans is 46, and the normal diploid number for rhesus monkeys is 48. Based on normal meiosis, how many chromosomes should the human gamete have, and how many chromosomes should the rhesus monkey have? Given these numbers, how many chromosomes would you expect the hybrid embryo to contain?

Accepted Answer

The answer of Suppose a researcher claims to be able...

Question 9

Assume you are starting with a cell whose diploid number is 6. Draw this cell going through all the meiotic phases. For each drawing, account for chromosome number at that phase, and indicate the number of chromosomes at that phase. Once you have completed your drawings, characterize the daughter cells.

Accepted Answer

The answer of Assume you are starting with a cell...

Question 10

In human life cycles, fertilization (sex) and reproduction are closely associated, yet they are very different processes. In what way are fertilization and reproduction opposites?

Accepted Answer

The answer of In human life cycles, fertilization (sex) and...

Question 11

Organisms that reproduce asexually produce "cones of genetically identical organisms. What would be the advantage to an organism of reproducing asexually?

Accepted Answer

The answer of Organisms that reproduce asexually produce "cones of...

Quiz 10: Preparing for Sexual Reproduction: Meiosis