Chapter 11 Post Class

What event in meiosis leads to the cell becoming haploid rather than the separation of sister chromatids ?

Formation of bivalents lead to spindle fibers from opposite poles attaching to homologous chromosomes

At the end of meiosis II, there are

Four haploid cells, with each chromosome consisting of a single chromatid

Random orientation of homologous chromosomes occurs in______ of meiosis.

metaphase I

Mutations can occur in any cell of the human body that contains DNA. However, only mutations in _____ can be passed on to the next generation.

Germ-line cells

During anaphase I of meiosis, ______ move towards opposite cell poles, whereas during anaphase II of meiosis, _____ are separated.

Homologous Chromosomes; sister chromatids

Why are two Phases of meiosis necessary?

In order to both reduce the chromosome number and separate sister chromatids

The number of cells produced in meiosis is

twice the number of cells produced in mitosis

A tetrad is made up

two homologous chromosomes, each consisting of two chromatids

Which of the following describes meiosis II in humans?

1N-> 1N

If sister chromatids failed to separate during meiosis II, what would the resulting gametes look like?

2 gametes will be normal, 1 gamete will have 2 of the affected chromosomes, and 1 gamete will have 0 of the affected chromosomes

Arrange the following events in the proper order in which they occur during meiosis I 1= separation of homologous chromosomes 2= Synapsis 3= Crossing-Over 4= Independent Assortment

2, 3, 4, 1

Which of the following events occurs during prophase 1?

breakdown of nuclear envelope, condensation of chromosomes, and movement of centrosomes

In animals, cells that will eventually undergo meiosis to produce the gametes are set aside early in the course of development. These cells are called

germ-line cells

At the end of meiosis I, each daughter cell is

haploid, and each chromosome consist of two chromatids

The number of chromosomes per cell is reduced from two sets to one set during

meiosis I

Suppose you have a multicellular eukaryotic organism that is composed entirely of haploid cells. This organism would produce gametes by the process of

mitosis

Centromeres divide in

mitosis and meiosis II

The spindle apparatus is fully formed by the end of

prometaphase II

Which of the following events occurs during anaphase I?

separation of homologous chromosomes

Separation of _____ occurs in anaphase II of meiosis

sister chromatids

In germline cells, when does DNA replicate?

During S phase

Which of the following features are unique to meiosis?

Synapsis, homologous recombination, and reduction division

Which of the following is not a haploid?

a cell in prophase I