Gene Mapping

Which genes in this picture are linked?

• A and C

• B and C

• A and B

• none of them

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What process does this show?

• independent assortment

• polyploidy

• chromosome map

• crossing over

Tags

NGSS.HS-LS3-2

Which chromosomes do crossing over?

• homologous chromosomes

• heterogenous chromosomes

• linked chromosomes

• all chromosomes

Which 2 processes create unique gametes?

• crossing over

• polyploidy

• independent assortment

• mapping

Which genes will have the greatest chance of being separated during crossing over?

• B and C

• A and B

• C and D

• D and A

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which conclusion is a result of Thomas Hunt Morgan’s research with fruit flies?

• Chromosome assortment during meiosis is not random.

• Linked genes are located on the same chromosome.

• The physical distance between genes can be determined.

• Genes recombine independently during mitosis.

Two genes on a given chromosome that are most likely to be inherited together are

• 6.8 map units apart.

• 10 map units apart.

• 2 map units apart.

• 18.5 map units apart

Suppose that the distance between two genes on a linkage map is 7 units. The cross-over frequency between the two genes is

• 0.7%

• 7%

• 70%

• 700%

Given the crossover frequency of each of the following genes, construct a chromosome map.  

Gene    Frequency of Crossover

A-C            30%

B-C            45%

B-D            40%

A-D            25%

• A - B - C - D

• B - D - A - C

• B - A - D - C

• C - A - D - B

Tags

NGSS.HS-LS4-3

The recombination frequency between gene F and gene G is 10.4%, the recombination frequency between gene F and gene H  is 8.0%, and the recombination frequency between gene G and gene H is 18.4%. Which is the correct arrangement of these genes?  

• FGH

• FHG

• GFH

• HFG

Tags

NGSS.HS-LS4-3