Gene Linkage And Mapping

Question 1

gene linkage

Answer 1

Genes are linked if present on the same chromosome

Question 2

Recombination

Answer 2

The divergence from linkage the frequency of recombination reflects the distance between genes .

Question 3

Tetrad

Answer 3

Bivalent 4 homologous chromatids

Question 4

Chiasma

Answer 4

The physical junction between the homologous chromatids
The site where recombination Akers

Question 5

Relationship between distance of genes, and the frequency of recombination and crossing over

Answer 5

The closer jeans are to each other on the chrome Mazzone, the light clear they are to cross over together, decreasing the likelihood of a recombinant gamete
The further genes are from each other, the more likely they are to crossover independently from each other

Question 6

Map units

Answer 6

Unit of distance between genes on a chromosome
= number of recombinants/total number of offspring X 100

Question 7

When does crossing over occur?

Answer 7

Prophase, one of meiosis

Question 8

Another unit equivalent to map units

Answer 8

cM = centimorgans

Question 9

Cis configuration

Answer 9

Dominant alleles on one homologue and recessive together on another

Question 10

Trans configuration

Answer 10

I’m a dominant and recessive on one homologue and the other dominant and recessive on another

Question 11

G