Pedigree Chart

Which is the set of alleles that an individual possesses?

• A gene
• A genotype
• A genome
• A genus

What is a genetic test cross?

• Testing a suspected homozygote by crossing it with a known heterozygote
• Testing a suspected heterozygote by crossing it with a known heterozygote
• Testing a suspected homozygote by crossing it with a known homozygous dominant
• Testing a suspected heterozygote by crossing it with a known homozygous recessive

A parent organism of unknown genotype is mated in a test cross.  Half of the offspring have the same phenotype as the parent.  What can be concluded from this result?

• The parent of unknown genotype is heterozygous
• The parent of unknown genotype is homozygous dominant
• The parent of unknown genotype is homozygous recessive
• The parent of known genotype is heterozygous

Tags

NGSS.HS-LS3-1

If an organism that is homozygous recessive for a trait is crossed with a heterozygote, what is the chance of getting a homozygous recessive phenotype in the first generation?

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-3

The pedigree chart below shows the blood types of three members of a family. What could be the blood types of individuals 1 and 2?

• 1= A 2= AB

• 1=AB 2=A

• 1=O 2=AB

• 1=B 2=A

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The blood groups of a mother and 4 children are indicated on the pedigree chart below.  What are the possible blood groups of the father?

• Group A only
• Group A or B only
• Group AB only
• Group A, B or AB only

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What type of inheritance is shown in this pedigree chart?

• X-linked dominant
• Y-linked dominant
• X-linked recessive
• Y-linked recessive

What evidence is given in the pedigree chart below to establish that the condition is caused by a dominant allele?

• Two unaffected parents have unaffected children
• Two affected parents have affected children
• An affected parent and an unaffected parent have affected children
• Two affected parents have an unaffected child

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Examine the pedigree. The allele for the presence of a widow’s peak is dominant. Therefore, we can tell from the chart that in the couple labeled 2:

• the male is heterozygous and the female is homozygous.
• the male is homozygous and the female is heterozygous.
• the male is homozygous and the female is homozygous.
• the male is heterozygous and the female is heterozygous.

Tags

NGSS.HS-LS3-1

What does a horizontal line between a square and a circle mean?

• They are siblings
• They are cousins
• They are married ("together")
• They are the children