C7 Review-Extending Mendelian Genetics

A person who has a disorder caused by a recessive allele is...

• considered a carrier of the disorder. 
• homozygous for the recessive allele. 
• unable to pass the allele to offspring
• certain to have offspring with the disorder 

Gene expression is influenced by many factors. Which of the following is a factor in gene expression? 

• karyotype
• pedigree
• environment
• phenotype

Tags

NGSS.HS-LS3-2

This Punnett square shows a cross between two parents who have the genotype Ss for a genetic disorder caused by a recessive allele. Which of the following will have the genetic disorder?

• Ss parent
• Ss offspring
• SS offspring
• ss offspring

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two parents have the genotype Gg for a genetic disorder caused by a dominant allele. What is the chance that any of their children will inherit the disorder? 

• 25% 
• 50% 
• 75% 
• 100% 

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

For an XX female to express a recessive sex-linked trait, she must have...

• a Y chromosome.
• an inactivated allele.
• two recessive alleles.
• two dominant alleles.

Human height occurs in a continuous range because it is affected by the interaction of several genes, making it a...

• autosomal trait.
• sex-linked trait.
• polygenic trait.
• codominant trait.

Tags

NGSS.HS-LS3-3

Suppose a mouse is
• homozygous for alleles that produce black fur and
• homozygous for alleles of an epistatic gene that prevents fur coloration.
What color fur will the mouse have?

• all white
• mostly black
• entirely gray
• black and white

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

This gene linkage map shows the order of genes A, B, and C. Which of the following statements about the genes is true?

• The distance between A and B is 14.5 map units.
• A and B cross over 2.5% of the time.
• A and C are linked 8.5% of the time.
•  B and C are most likely to be inherited together.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Thomas Morgan’s research with fruit flies determined that...

•  alleles always assort independently.
• chromosomes are inherited as a group.
• genes never assort independently.
• traits sometimes are inherited as a group.

Two genes cross over 6% of the time. This percentage means that the genes are
 

•  inactivated in 6 out of 100 offspring.
• incompletely dominant in 6 out of 100 offspring.
• not inherited together in 6 out of 100 offspring. 
• on sex-chromosomes in 6 out of 100 offspring.

Tags

NGSS.HS-LS3-3