Linked Genes

If 20 offspring are recombinant and 100 are born in total, how many centimorgan apart are the 2 genes?

• 20 cM

• 0.2 cM

• 20 %

• 0.2 %

If 55 offspring are recombinant and 25 are parental, how many centimorgan apart are the 2 genes?

• 25 cM

• 55 cM

• 68.75 cM

• 75 cM

Tags

NGSS.HS-LS3-3

If 60 offspring are parental and 40 are recombinant, what percent is the chance that these 2 genes will be inherited together?

• 0.4 %

• 20 %

• 40 %

• 80 %

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What are linked genes?

• Genes located on the same chromosome that tend to be inherited together

• Genes located on different chromosomes

• Genes that are always inherited independently

• Genes that mutate frequently

Tags

NGSS.HS-LS3-1

Which of the following best describes the concept of genetic linkage?

• Independent assortment of genes

• Genes on the same chromosome that are inherited together

• Random mutation of genes

• Crossing over of genes

If two genes are linked, what is the expected outcome in terms of inheritance?

• They will always be inherited together

• They will never be inherited together

• They will be inherited together more often than not

• They will be inherited independently

In a dihybrid cross involving linked genes, what is the expected phenotypic ratio?

• 9:3:3:1

• 1:1:1:1

• 3:1

• Varies depending on the distance between genes

How does crossing over affect linked genes?

• It increases the likelihood of them being inherited together

• It decreases the likelihood of them being inherited together

• It has no effect on linked genes

• It causes linked genes to mutate

Tags

NGSS.HS-LS3-2

What is the unit of measurement for genetic linkage?

• Centimorgan

• Meter

• Kilogram

• Second

If 30 offspring are recombinant and 70 are parental, how many centimorgan apart are the two genes?

• 30 cM

• 70 cM

• 42.86 cM

• 100 cM

Tags

NGSS.HS-LS3-3