Practice Reading Pedigree Charts - 15 pts
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PROCEDURE: Study the Pedigree Chart that shows a family’s pattern of inheritance for eye color.
Non-blue eye color (B) is dominant to blue (b) eye color.
Answer the questions in the Data Chart based on the Pedigree Chart.
REMEMBER:
Dominant: traits (non-blue eyes) are either homozygous dominant alleles (BB) or heterozygous (Bb, has a dominant allele and a recessive allele).
Recessive: traits (blue eyes) can only be homozygous alleles (bb) for the recessive trait.
Homozygous: means same alleles
Heterozygous: means two different alleles
REMEMBER:
Genotype: allele or genetics of the individual (BB, Bb, or bb)
Phenotype: physical appearance based on dominate/recessive alleles (blue or non-blue eyes)
Number of generations (give answer as a number)
Number of children that individuals 1 & 2 had in generation I.
Number of female children from parents 1 & 2 in generation I.
Number of male children from parents 1 & 2 in generation I.
Number of individuals in generation II that have blue eyes.
Daughter #1 in generation II must have received which allele (B or b) from her Dad?
Number of individuals in generation II that are carriers.
Genotype for individual 4 in generation II.
Phenotype for individual 3 in generation II.
Number of females in generation III.
Number of female offspring individuals 1 & 2 had in generation II.
Number of individuals in generation III that have non-blue eyes.
Number of individuals in generation III that are carriers.
Genotype for individual 1 in generation III.
Genotype for individual 7 in generation III.
Phenotype for individual 7 in generation III.
Individual 7 in generation III must have received a (B or b) allele from both of her parents.