Bsc 170 Test 1

Front 1

Various forms of the same gene are called...?

Back 1

Alleles

Front 2

This term in genetics means the combination of alleles for a certain trait

Back 2

Genotype

Front 3

What is the name of the specialized region of a chromosome that often causes a cinching or narrowing of the chromosome at that spot?

Back 3

centromere

Front 4

What is the name of the tool used by geneticists in which they align the images of stained chromosomes into homologous pairs?

Back 4

Karyotype

Front 5

How were both Mendel and Morgan correct in talking about inheritance patterns?

Back 5

Genes are inherited independently as long as they are not present on the same chromosome

Front 6

What term means the genetic condition of having half the chromosomes found in a typical cell? This condition is abbreviated as n.

Back 6

Haploid

Front 7

Which structure in a cell coordinated the production of microtubules used in meiosis?

Back 7

Centrioles

Front 8

Which cell process begins with one diploid cell with replicated chromosomes and ends with two haploid cells with replicated chromosomes?

Back 8

Meiosis I

Front 9

At what stage of meiosis do sister chromatids separate?

Back 9

Anaphase of Meiosis II

Front 10

In animals, which specific cell type is produced by the process of meiosis?

Back 10

Gametes

Front 11

What is the number of chromosomes in a normal human somatic cell?

Back 11

22 pairs of autosomes and one pair of sex chromosomes

Front 12

A cross of a plant with white flowers and a plant with red flowers producing red and white marbled flowers is an example of what?

Back 12

Codominance

Front 13

What is it called when a heterozygote for a trait exhibits a phenotype half-way between the dominant and recessive phenotype, such as a red and white parent having pink offspring?

Back 13

Incomplete dominance

Front 14

What is cytokinesis?

Back 14

The division of cells following mitosis

Front 15

In which phase of mitosis are the chromosomes completely separated and the nuclear membranes begin to be rebuilt?

Back 15

Telophase

Front 16

What happens in the prophase of mitosis?

Back 16

Chromosomes begin to condense, centrioles begin to move apart, the nuclear membrane begins to degrade

Front 17

In what phase of the cell cycle does DNA replication occur?

Back 17

S Phase

Front 18

How does cancer tie in with cell cycle?

Back 18

Cancer results when cells undergo cell division too often

Front 19

In what phase of mitosis do chromosomes begin to separate towards opposite ends by shortening microtubules?

Back 19

Anaphase

Front 20

In what phase of mitosis do chromosomes begin to condense, and centrosomes begin to move away from each other?

Back 20

Prophase

Front 21

Which phase of the cell cycle could be thought of as a recovery phase following the replication of DNA?

Back 21

G2 Phase

Front 22

In mitosis, chromosomes separate by which specific mechanism?

Back 22

Molecular motors in the kinetochore move the chromosome toward the centrioles

Front 23

To what specific structure on a chromosome do microtubules attach during mitosis?

Back 23

Kinetochore

Front 24

Which cell process begins with two haploid cells with replicated chromosomes and ends with four haploid cells with unreplicated chromosomes?

Back 24

Meiosis II

Front 25

What does Prophase I consist of?

Back 25

Chromosomes condense, replication of chromosomes, tetrad formation

Front 26

Which specific cell process begins with haploid cells containing replicated chromosomes and ends with twice as many haploid cells with unreplicated chromosomes?

Back 26

Meiosis II

Front 27

At what stage of meiosis do tetrads form?

Back 27

Prohpase of Meiosis I

Front 28

What is the name of the type of diploid cells that make up the vast majority of the structure of your body?

Back 28

Somatic cells

Front 29

In which specific stage of meiosis would you expect to see sister chromatids being pulled apart from each other?

Back 29

Anaphase I

Front 30

In mitosis, in which phase are chromosomes lined up along the midplane of the cell?

Back 30

Metaphase

Front 31

In mitosis, during which phase do centromeres split and chromosomes begin to pull apart?

Back 31

Anaphase

Front 32

In which phase of mitosis do chromosomes begin to separate towards opposite ends by shortening microtubules?

Back 32

Anaphase