VP #9: Amoeba Sisters Pedigrees

What do circles represent in a pedigree?

• Males

• Females

• Children

• Parents

What does a marriage line connecting two individuals represent?

• A marriage between the individuals.

• A symbol of competition between the individuals.
• People that are related.

• Siblings

In a Mendelian trait, a recessive trait is only expressed when

• the individual has one copy of the recessive allele
• the individual has two copies of the recessive allele
• the individual has two copies of the dominant allele
• the individual has no copies of the recessive allele

What type of trait is being tracked if the shaded shapes in a pedigree represent attached earlobes?

• Recessive

• Sex-linked

• Dominant

• Autosomal Dominant

In a pedigree, what does it mean if an individual is a carrier?

• They express the recessive trait.

• They have two recessive alleles.

• They express the dominant trait.

• They have one dominant and one recessive allele.

If you are tracking a dominant trait, how MANY dominant alleles must be present in order for the trait to appear?

• 0

• 1

• 2

• 3

What is a key difference between autosomal and sex-linked traits?

• Autosomal traits are not linked to sex chromosomes.

• Sex-linked traits are dominant.

• Sex-linked traits are only found in females.

• Autosomal traits are only found in males.

What does a half-shaded symbol in a pedigree indicate?

• The individual is a carrier.

• The individual is unaffected.

• The individual has a dominant trait.

• The individual has a recessive trait.