BiSc Chapter 8 (Cellular Reproduction: Cells from Cells)

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For a species with four pairs of chromosomes, ____chromosome combinations are possible.

16

How many chromosomes does an individual with Turner syndrome have?

2n -1

What chromosomes belong to a normal human female?

44 autosomes, 2 X chromosomes

What chromosomes belong to a normal human male?

44 autosomes, one X chromosome, and one Y chromosome

Sexual intercourse in humans...

Allows a haploid sperm cell to fertilize a haploid egg cell

Chromosomes that do not determine the sex of an individual are called...

Autosomes

What is the difference between a benign and a malignant tumor?

Benign tumors do not metastasize; malignant tumors do

Homologous chromosomes...

Carry genes controlling the same inherited characteristics

Sister chromatids are joined at the

Centromere

A___ describes a site of crossing over.

Chiasma

Which of the following occurs during interphase?

Chromosome duplication

During metaphase...

Chromosomes line up in the middle of the cell

Which of the following is a characteristic seen in prophase I that does not occur in prophase II?

Crossing over occurs

Nucleosomes are made of...

DNA and histone proteins

Chromatin consists of

DNA and protein

In meiosis, how does prophase I differ from prophase II?

During prophase I there is one diploid cell; during prophase II there are two haploid cells

A karyotype (a chromosome display) would be unable to determine____.

Eye color

How much genetic material is present in a cell during prophase I compared to a cell that has completed meiosis II?

Four times as much

Crossing over during prophase I results in...

Genetic recombination

A cell that completed the cell cycle without undergoing cytokinesis would...

Have two nuclei

During metaphase I...

Homologous chromosomes line up in the middle of the cell

Which of the following is the best description of the events of anaphase I?

Homologous chromosomes randomly separate and migrate to opposite poles

A(n)_____ is an example of an organism that can sometimes reproduce asexually.

Komodo Dragon

One difference between mitosis and meiosis is...

Mitosis produces cells genetically identical to the parent cell, but meiosis does not

Amanda's abnormal number of sex chromosomes resulted from

Nondisjunction

The chromosomes of eukaryotic cells are found in the

Nucleus

Plant cell cytokinesis differs from animal cell cytokinesis because

Plant cells form a cell plate and animal cells do not

Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following EXCEPT

Production of sperm and eggs

The correct sequence of stages of mitosis is

Prophase, Metaphase, Anaphase, Telophase

Which of the following will help prevent cancer and increase survival?

Seek early detection of tumors

A duplicated chromosome consists of two

Sister chromatids

Which of these events occurs during anaphase?

Sister chromatids separate

Cytokinesis typically begins during the ___ stage of mitosis

Telophase

Which of the following is a stage of mitosis?

Telophase

Anaphase II is essentially the same as mitotic anaphase except that in anaphase II____and in mitotic anaphase_____.

The cells are haploid and sister chromatids separate...the cells are diploid and sister chromatids separate

During telophase...

The events of Prophase are reversed

Genetic variation is accomplished by all but one of the following. Which is it?

The events of meiosis II

Which of the following occurs during prophase?

The mitotic spindle begins to form

The cell cycle results in the production of

Two cells, each with the same amount of genetic material and the same genetic information

Upon completion of telophase I and cytokinesis, there is (are)___cell(s).

Two haploid

With respect to her sex chromosomes, Amanda would be designated as ___.

XO

How many chromosomes can a gamete possess as a result of nondisjunction?

n + 1 or n-1


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