Unit 3 lecture 3 10/19/22

Question 1

Mendel’s “hereditary factors” were __________

Answer 1

genes

Question 2

Today we know that genes are located on __________

Answer 2

chromosoes

Question 3

Thomas Hunt Morgan and his students began studying the genetics of the fruit fly, __________, in 1907

Answer 3

Drosophila melanogaster

Question 4

The 1._________ gene on the Y chromosome is required for the developments of 2._________

Answer 4

1.SRY
2.testes

Question 5

A gene that is located on either sex chromosome is called a _________

Answer 5

sex-linked gene

Question 6

The _________ does not undergo _________ during prophase I

Answer 6

1.Y chromosome
2.Crossing over

Question 7

The inactive X condenses into a _________

Answer 7

Barr body

Question 8

Genes located on the same chromosome that tend to be inherited together are called _________

Answer 8

linked genes

Question 9

Offspring with a phenotype matching one of the parental phenotypes are called _________

Answer 9

parental types

Question 10

Offspring with nonparental phenotypes (new combinations of traits) are called _________, or recombinants

Answer 10

recombinant types

Question 11

A _________ is a genetic map of a chromosome based on recombination frequencies

Answer 11

linkage map

Question 12

_________ indicate the positions of genes with respect to chromosomal features

Answer 12

cytogenetic maps

Question 13

In _________, pairs of homologous chromosomes do not separate normally during meiosis

Answer 13

nondisjunction

Question 14

_________ results from the fertilization of gametes in which nondisjunction occurred

Answer 14

aneuploidy

Question 15

A _________ has only one copy of a particular chromosome

Answer 15

momosomic zygote

Question 16

A _________ has three copies of a particular chromosome

Answer 16

trisomic zygote

Question 17

_________ is a condition in which an organism has more than two complete sets of chromosomes

Answer 17

Polyploidy

Question 18

_________(3n) is three sets of chromosomes

Answer 18

Triploidy

Question 19

_________(4n) is four sets of chromosomes

Answer 19

Tetraploidy

Question 20

Polyploidy is _________ in plants, but not animals

Answer 20

common

Question 21

_________ removes a chromosomal segment

Answer 21

Deletion

Question 22

_________ repeats a segment

Answer 22

Duplication

Question 23

_________ orientation of a segment within a chromosome

Answer 23

Inversion reverses