2b.11- Video (Biology)

What does a filled-in circle represent in a pedigree?

• A normal male

• A normal female

• An affected male

• An affected female

In a pedigree, what does a horizontal line between a male and a female represent?

• Siblings

• Marriage or a couple that produced children

• Identical twins

• Non-identical twins

If a dominant trait is being tracked in a pedigree, what is the genotype of a person who is not shaded in?

• At least one dominant allele (e.g., AA or Aa)

• At least one recessive allele (e.g., Aa or aa)

• Two recessive alleles (e.g., aa)

• One dominant and one recessive allele (e.g., Aa)