Genetic Linkage & mapping in eukaryotes 3

Question 1

Genetic Map

Answer 1

A diagram that describes the order of genes along a chromosome

Question 2

Synteny

Answer 2

Two or more genes are located on the same chromosome

Question 3

Genetic linkage (linkage)

Answer 3

Genes that are close together on the same chromosome tend to be transmitted together

Question 4

Crossing over

Answer 4

Chromsomes exchanging alleles with one another (usually occurs in prophase of meiosis 1)

Question 5

Crossing over may produce ___________

Answer 5

Recombinant genotypes

Question 6

Recombinant offspring

Answer 6

Have different combination of alleles then the orginal cell (parent)

Question 7

Genetic Recombination

Answer 7

When offsprings have combination of alleles (or traits) that are different from the parents

Question 8

_______________ are produced by the exchange of DNA between two homologous chromosomes during meiosis & results in combination of traits different from parents

Answer 8

Recombinant offspring

Question 9

____________ carries chromosomes that are the product of crossing over

Answer 9

Recombinant offspring

Question 10

The likelihood of crossing over to occur between two genes depends on what?

Answer 10

The distance between them

Question 11

If two genes are __________ then crossing over is likely to occur

Answer 11

Far apart

Question 12

If two genes are _________ then crossing over isn’t likely to occur

Answer 12

Close together

Question 13

A ________ can be used to distingiush between the linkage & independent assortment

Answer 13

Chi Square Test

Question 14

Genetic Mapping

Answer 14

Used to determine the linear order & distance among genes that are linked to each other on the same chromosome

Question 15

Locus

Answer 15

Where a gene is located

Question 16

The frequency of ___________ between two genes is used to determine the mapping distance between two chromosomes

Answer 16

Recombination

Question 17

______________ can give hints to the distance of the genes like if there a high percentage of recombinant offspring then the genes must be far apart & if there is a low percentage they must be closer to each other

Answer 17

Recombinant offspring

Question 18

Genetic mapping is only relevant with ___________ parents

Answer 18

Heterozygote

Question 19

Map distance calaculation

Answer 19

of recombinant offspring / # of offspring x 100

Question 20

Mitotic Recombination

Answer 20

When mitotic crossing over produce a pair of recombinant chromosomes that have a new combination of alleles

Question 21

________ provide evidence that mitotic recombination had occur

Answer 21

Twin spots