University:
Abraham Baldwin Agricultural College
Course:
BIOL3200K | Genetics
Academic year:

2020
Views:

200

Pages:

2
Author:

Initafattaugsif

Punnett Square Practice  ANSWER KEY  Directions: Use the scenarios given below to complete the Punnett squares and determine the potential offspring for each set of parents. Use the lines on the right hand side to list the genotype and phenotype for each possible child.  1. A brown-eyed homozygous dominant female (BB) has a baby with a brown-eyed heterozygous male (Bb). B = brown, b = blue  Genotype Phenotypes  Possibility 1: BB brown eyes Possibility 2: BB brown eyes  Possibility 3: Bb brown eyes Possibility 4: brown eyes Bb   2. Freckles (F) are dominant to no freckles (f). A heterozygous mother (Ff) and heterozygous father (Ff) have a baby. F = freckles, f = no freckles   Phenotype Genotype  Possibility 1: FF freckles Possibility 2: Ff freckles Possibility 3: ff no freckles Possibility 4: freckles Ff    3. The ability to roll your tongue (R) is a dominant trait. A woman who cannot roll her tongue (rr) has a baby with a man who is homozygous dominant for this trait (RR). R = can roll tongue, r = cannot roll tongue  Genotype Phenotype  Possibility 1: Rr Can roll tongue Possibility 2: Rr Can roll tongue Possibility 3: Rr Can roll tongue Possibility 4: Can roll tongue Rr  Punnett Square Practice Name: _____________________ Directions: Use the scenarios given below to complete the Punnett squares and determine the potential offspring for each set of parents. Use the lines on the right hand side to list the genotype and phenotype for each possible child.  1. A brown-eyed homozygous dominant female (BB) has a baby with a brown-eyed heterozygous male (Bb). B = brown, b = blue  Genotype Phenotype  Possibility 1: _______ _____________________ Possibility 2: _______ _____________________ Possibility 3: _______ _____________________ Possibility 4: _____________________ _______    2. Freckles (F) are dominant to no freckles (f). A heterozygous mother (______) and heterozygous father (______) have a baby. F = freckles, f = no freckles   Phenotype Genotype  Possibility 1: _______ _____________________ Possibility 2: _______ _____________________ Possibility 3: _______ _____________________ Possibility 4: _____________________ _______    3. The ability to roll your tongue (R) is a dominant trait. A woman who cannot roll her tongue (______) has a baby with a man who is homozygous dominant for this trait (______). R = can roll tongue, r = cannot roll tongue  Genotype Phenotype  Possibility 1: _______ _____________________ Possibility 2: _______ _____________________ Possibility 3: _______ _____________________ Possibility 4: _____________________ _______ 