Lab Exercises: In these exercises, you will learn to use the Punnett square to determine geno-typic and phenotypic outcomes for monohybrid, dihybrid, incomplete, codominant, epistatic,and sex-linked traits.Exercise #1: Monohybrid CrossesA male with blue eyes has a child with a homozygous dominant brown-eyed female. Whatare the genotypes and phenotypes of the resulting offspring?1.Genotype rahioR RRRrPhenoty pe vatioRrYFEx PTA male offspring from above has four children with his heterozygous brown-eyed wife.What are the genotypes and phenotypes of the resulting offspring? What are the genotypicRt2.and phenotypic ratios?YRR IRrKr RrYr3. A heterozygous brown-eyed male has four children with his blue-eyed wife. What are thegenotypes and phenotypes of the resulting offspring? What are the genotypic and pheno-typic ratios?120

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Asked Nov 1, 2019
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Lab Exercises: In these exercises, you will learn to use the Punnett square to determine geno-
typic and phenotypic outcomes for monohybrid, dihybrid, incomplete, codominant, epistatic,
and sex-linked traits.
Exercise #1: Monohybrid Crosses
A male with blue eyes has a child with a homozygous dominant brown-eyed female. What
are the genotypes and phenotypes of the resulting offspring?
1.
Genotype rahio
R RR
Rr
Phenoty pe vatio
Rr
Y
FEx PT
A male offspring from above has four children with his heterozygous brown-eyed wife.
What are the genotypes and phenotypes of the resulting offspring? What are the genotypic
Rt
2.
and phenotypic ratios?
Y
RR IRr
K
r Rr
Yr
3. A heterozygous brown-eyed male has four children with his blue-eyed wife. What are the
genotypes and phenotypes of the resulting offspring? What are the genotypic and pheno-
typic ratios?
120
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Lab Exercises: In these exercises, you will learn to use the Punnett square to determine geno- typic and phenotypic outcomes for monohybrid, dihybrid, incomplete, codominant, epistatic, and sex-linked traits. Exercise #1: Monohybrid Crosses A male with blue eyes has a child with a homozygous dominant brown-eyed female. What are the genotypes and phenotypes of the resulting offspring? 1. Genotype rahio R RR Rr Phenoty pe vatio Rr Y FEx PT A male offspring from above has four children with his heterozygous brown-eyed wife. What are the genotypes and phenotypes of the resulting offspring? What are the genotypic Rt 2. and phenotypic ratios? Y RR IRr K r Rr Yr 3. A heterozygous brown-eyed male has four children with his blue-eyed wife. What are the genotypes and phenotypes of the resulting offspring? What are the genotypic and pheno- typic ratios? 120

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Phenotype is an observable characteristic of an organism, while the genotype is the actual pair of alleles present in an individual. The two identical alleles that determine the particular trait is homozygous, whereas two different alleles for a trait is heterozygous.

Let the allele for blue eyes is b, and for brown eyes is B. The male has blue eyes and his genotype is bb that means he is homozygous recessive. The female has brown eyes and her genotype is BB that means she is homozygous dominant.

Step 3

The following Punnet square shows the cross between a m...

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Male/ В В female gametes ь ВЬ ВЬ (Brown) (Brown) b ВЬ ВЬ (Brown) (Brown)

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