Textbook Problem

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Refer to problem 2. Determine the predicted genotype frequencies among the offspring of the fol1owing crosses:

1. a. AABB × aaBB
2. b. AaBb × AABb
3. c. AaBb × aa.bb
4. d. AaBb × AaBb

Question No: 2

2. Assuming that independent assortment occurs during meiosis, what type(s) of gametes will form in individuals with the following genotypes?

1. a. AABB
2. b. AaBB
3. c. Aabb
4. d. AaBb

Summary Introduction

To predict: The predicted genotype frequencies among the offspring for the dihybrid cross AABB × aaBB.

Introduction: The law of independent assortment and law of segregation are the laws proposed by Gregor Johann Mendel, a geneticist. Mendel proposed the law of independent assortment based on the results of monohybrid cross that “two alleles at any locus tend to separate from each other during meiosis, so they end up in different gametes”. Mendel proposed the law of independent assortment based on the results of dihybrid cross that “alleles at one locus tend to assort into gametes independently of alleles at other loci”. The number of possible allele combination for the given genotype is given by the formula 2ⁿ where “n” is the number of heterozygous alleles that are present.

Explanation of Solution

A monohybrid cross is constructed with Punnett square for the parents having the genotype AABB and aaBB...

Summary Introduction

To predict: The predicted genotype frequencies among the offspring for the dihybrid cross AaBB × AABb.

Introduction: The law of independent assortment and law of segregation are the laws proposed by Gregor Johann Mendel, a geneticist. Mendel proposed the law of independent assortment based on the results of monohybrid cross that “two alleles at any locus tend to separate from each other during meiosis, so they end up in different gametes”. Mendel proposed the law of independent assortment based on the results of dihybrid cross that “alleles at one locus tend to assort into gametes independently of alleles at other loci”. The number of possible allele combination for the given genotype is given by the formula 2ⁿ where “n” is the number of heterozygous alleles that are present.

Summary Introduction

To predict: The predicted genotype frequencies among the offspring for the dihybrid cross AaBb × aabb.

Introduction: The law of independent assortment and law of segregation are the laws proposed by Gregor Johann Mendel, a geneticist. Mendel proposed the law of independent assortment based on the results of monohybrid cross that “two alleles at any locus tend to separate from each other during meiosis, so they end up in different gametes”. Mendel proposed the law of independent assortment based on the results of dihybrid cross that “alleles at one locus tend to assort into gametes independently of alleles at other loci”. The number of possible allele combination for the given genotype is given by the formula 2ⁿ where “n” is the number of heterozygous alleles that are present.

Summary Introduction

To predict: The predicted genotype frequencies among the offspring for the dihybrid cross AaBb × AaBb.

Introduction: The law of independent assortment and law of segregation are the laws proposed by Gregor Johann Mendel, a geneticist. Mendel proposed the law of independent assortment based on the results of monohybrid cross that “two alleles at any locus tend to separate from each other during meiosis, so they end up in different gametes”. Mendel proposed the law of independent assortment based on the results of dihybrid cross that “alleles at one locus tend to assort into gametes independently of alleles at other loci”. The number of possible allele combination for the given genotype is given by the formula 2ⁿ where “n” is the number of heterozygous alleles that are present.