Multiple Choice
In a monohybrid cross, what does the term genotype ratio refer to?
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2. Mendel's Laws of Inheritance
Monohybrid Cross
Multiple Choice
In a monohybrid cross, what is a Punnett square used to determine?
A
The exact DNA sequence of the allele inherited by each offspring
B
The number of chromosomes present in a gamete after meiosis
C
The rate of crossing over between two linked genes on a chromosome
D
The expected genotypic and phenotypic ratios of offspring from a genetic cross
Verified step by step guidance1
Understand that a Punnett square is a diagrammatic tool used in genetics to predict the possible genotypes of offspring from a particular genetic cross.
Recognize that in a monohybrid cross, we focus on a single gene with two alleles, one from each parent, and the Punnett square helps visualize all possible allele combinations in the offspring.
Set up the Punnett square by placing the alleles from one parent along the top and the alleles from the other parent along the side, creating a grid where each cell represents a possible genotype of the offspring.
Fill in each cell by combining the alleles from the corresponding row and column to determine all potential genotypes of the offspring.
Use the completed Punnett square to calculate the expected genotypic ratios (proportions of different genotypes) and phenotypic ratios (observable traits) among the offspring, based on dominant and recessive allele interactions.
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