Dihybrid/Monohybrid Cross Flashcard

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What is a monohybrid cross?

Back

A monohybrid cross is a genetic cross between parents that differ in a single trait, focusing on the inheritance of one gene with two alleles.

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What is a dihybrid cross?

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A dihybrid cross is a genetic cross between parents that differ in two traits, focusing on the inheritance of two genes, each with two alleles.

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What does it mean for an allele to be dominant?

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A dominant allele is one that expresses its trait even when only one copy is present in the genotype.

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What does it mean for an allele to be recessive?

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A recessive allele is one that only expresses its trait when two copies are present in the genotype.

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What is a genotype?

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A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

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What is a phenotype?

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A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

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How do you determine the gametes produced by a genotype?

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To determine the gametes, list all possible combinations of alleles from each parent, considering one allele from each gene.

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What is a Punnett square?

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A Punnett square is a diagram used to predict the genotypes of offspring from a genetic cross.

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What is the phenotypic ratio in a monohybrid cross?

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The phenotypic ratio in a monohybrid cross is typically 3:1 for dominant to recessive traits.

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What is the genotypic ratio in a dihybrid cross?

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The genotypic ratio in a dihybrid cross is typically 1:2:1 for homozygous dominant, heterozygous, and homozygous recessive.