Genetics Study Guide (Page 5 of 5) in pdf

Genetics Study Guide Page 5

If a man with A type blood marries a woman of O type blood and they have five children, all of

blood type A. What is the most probable genotype of the man?

What is the genotype of the woman? _________

Pedigree Charts

Draw a pedigree chart for the family described below and use the chart to determine the

genotype or possible genotypes of each member of the family. Be sure to define your variables.

Remember that males are represented by squares and females are circles. Shade in all

individuals who possess the trait that is being looked at.

In humans, having freckles is dominant over not having them. Both Mr. And Mrs. Chambers

have freckles. Of their three children, Robin and Daniel have freckles but Alex does not. Robin

marries Stephen, who does not have freckles. They have two children, Kevin and Beth, who do

not have freckles. Daniel marries Diane who also has freckles. They have one son, Phillip, who

also has freckles. Alex marries Mary, who has freckles. They have one daughter, Norma, who

does not have freckles.

***Also for pedigrees, make sure you can tell if a the inherited trait is dominant or recessive.***

Key Terms to be familiar with: heredity, traits, characteristic, pedigree, diploid, haploid, gene,

allele, homozygous, heterozygous, phenotype, genotype, Mendel’s Laws, monohybrid,

dihybrid, non-Mendelian genetics (codominance, incomplete dominance, sex linkage, multiple

alleles), Karyotypes, Monosomy, Trisomy, Nondisjunction

Genetics Study Guide Page 5