Linkage

What is the map distance if the following offspring are produced:  345 wild, 8 wild/yellow, 10 vestigial/wild, 325 yellow/vestigial? (note: these are not given as percents!)

• 97.3
• 2.6
• 18
• 1.8

Tags

NGSS.HS-LS4-3

1 map unit is equal to:

• 1 nm
• 1% recombination
• 1 chromosome
• 1 mutation

What determines gender in humans? 

• the X and Y chromosome
• chromosome 21
• x chromosome
• y chromosome

If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true? Make a punnett square!

• All sons will have hemophilia
• all daughters will have hemophilia
• 50% of daughters and 50% of sons have hemophilia
• 100% of sons have hemophilia and 100% of daughters are carriers

Tags

NGSS.HS-LS3-1

Alleles that are inherited on the X or Y chromosomes:

• multiple alleles
• sex-linked genes
• codominance
• polygenic inheritance

Hemophilia is an x-linked trait.  A normal man marries a woman that is a carrier.  What are their chances of having a child with the disorder?

• O%
• 50%
• 25%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

NGSS.HS-LS3-2

According to _______, genes that are closer together on a chromosome, have a higher chance of being inherited together.  

• Gene Linkage
• Polygenic
• Pleiotropy
• Epistasis

A and B are linked genes. In a study of 100 offspring, 80 parental genotypes for A and B, while 20 were recombinants. A and B are how many map units apart? 

• 10
• 5
• 20
• 30

Tags

NGSS.HS-LS3-3

X-inactivation balances the inequality of genes between males and females. 

• True 
• False 

What type of heredity is shown in the pedigree?

• Sex-Linked Dominant
• Sex-Linked Recessive
• Autosomal Dominant
• Autosomal Recessive 

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2