Punnett Square Review

Steven and Anna have 2 daughters and 2 sons together. Both of their sons are colorblind, but non of their daughters are colorblind.

What can you determine about the genotypes of Steven and Anna?

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A man with the genotype AO for blood marries a woman with the genotype BO. What are the chances that their child will have type A blood?

• 25%

• 50%

• 0%

• 5%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Identify the inheritance pattern:

A blue fish is crossed with a red fish and all of the offspring are purple.

• Mendelian

• Codominance

• Incomplete Dominance

• Sex-linked

What can be determined from the karyotype shown?

• The person is a female

• The person is a calico

• The person has a mutation

• The person is a male

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

State the phenotypes and ratios of a cross between two individuals with type AB blood.

• Type A- 75%

  Type B-75%

• Type A-50%

  Type B- 50%

• Type A- 25%

  Type AB- 50%

  Type B- 25%

• Type AB- 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A couple is expecting their first child. They have the alleles shown in the Punnett square for color-blindness.

What is the probability that they will have a color-blind daughter?

• 15%

• 25%

• 50%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Down Syndrome is a genetic disorder caused when chromosomes do not divide equally during cell division, causing them to have an extra chromosome.

What genetic tool would be most useful in diagnosing Down Syndrome?

• Karyotype

• Pedigree

• Punnett Square

• Electrophoresis

Answer explanation

A karyotype shows you every chromosome that a person has. If they have more than 2 copies for any chromosome, then they have a genetic disorder.

Which inheritance pattern was studied by Mendel?

• Sex-linked

• Dominant and Recessive

• Co-dominant

• Incomplete Dominance

Which statement is not true regarding the transmission of sex-linked traits in a population?

• Males inherit sex linked traits from their father.

• Males can not be carriers for sex-linked traits.

• Males can inherit an allele for a sex-linked trait from their mother

• Males cannot pass alleles for sex-linked traits to their daughters.

Tags

NGSS.HS-LS3-1

What is an allele?

• A different form of a particular gene, i.e. brown fur or white fur

• Someone's name

• A section of DNA that codes for a certain trait

• Heterozygous

Tags

NGSS.HS-LS3-1