Meiosis Lab Flashcards

Questions and Answers

Which of the following events occur during prophase I? (Select all that apply)

Movement of centrosomes (correct)

Separation of homologous chromosomes

Breakdown of the nuclear envelope (correct)

Condensation of chromosomes (correct)

Which of the following events occurs during anaphase I?

Separation of sister chromatids

Separation of homologous chromosomes (correct)

Condensation of chromosomes

Formation of the nuclear envelope

At the end of meiosis I, there are two haploid cells, each with two sister chromatids per chromosome.

True

At the end of meiosis II, there are?

four haploid cells, with each chromosome consisting of a single chromatid. Signup and view all the answers

In animal cells, cytokinesis is accomplished by the formation of a cleavage furrow.

True Signup and view all the answers

Separation of ________ occurs in anaphase II of meiosis.

sister chromatids Signup and view all the answers

What is the overall purpose of meiosis?

to produce four genetically different haploid cells Signup and view all the answers

The exchange of genetic material between nonsister chromatids is called what and occurs during which phase of meiosis?

crossing-over, prophase I Signup and view all the answers

Select from the following list of statements all of the ways in which meiosis II differs from meiosis I.

Interkinesis doesn't involve the replication of chromosomes Signup and view all the answers

What cells in the body are most likely to have originated through the process of meiosis?

sperm and egg cells Signup and view all the answers

If a sperm cell contains 8 chromosomes, it comes from an animal that has ______ chromosomes.

16 Signup and view all the answers

Study Notes

Meiosis Overview

Meiosis is a two-stage cell division process that produces four genetically diverse haploid cells.
It consists of two main phases: Meiosis I and Meiosis II.

Prophase I Events

Breakdown of the nuclear envelope occurs.
Chromosomes condense, becoming visible under a microscope.
Centrosomes move to opposite poles of the cell.

Anaphase I and II Events

In Anaphase I, homologous chromosomes separate and move towards opposite poles.
In Anaphase II, sister chromatids are separated and pulled to opposite ends of the cell.

Cellular Outcomes

At the end of Meiosis I, there are two haploid cells, each containing two sister chromatids per chromosome.
At the end of Meiosis II, four haploid cells are produced, and each chromosome consists of a single chromatid.

Cytokinesis in Animal Cells

In animals, cytokinesis occurs via the formation of a cleavage furrow, pinching the cell in two.

Genetic Variation

Crossing-over occurs during Prophase I, where genetic material is exchanged between nonsister chromatids, enhancing genetic diversity.

Differences Between Meiosis I and II

Meiosis II differs from Meiosis I as it involves no chromosome replication during interkinesis.
Crossing-over only occurs during Prophase I, not Prophase II.
Sister chromatids separate in Anaphase II, while homologous chromosomes separate in Anaphase I.

Cells Produced by Meiosis

Sperm and egg cells are the primary products of meiosis, characterized by being haploid.

Chromosome Count

A sperm cell with 8 chromosomes indicates that the original organism has a total of 16 chromosomes, as haploid cells contain half the organism's total chromosome count.

Description

Test your knowledge on the stages of meiosis with these flashcards. Each card covers crucial events that occur during meiosis I, such as prophase I and anaphase I, helping you understand the process in detail.