Genetics and Inheritance Review

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What is Codominance?

Back

A genetic scenario where both alleles in a heterozygous individual are fully expressed, resulting in a phenotype that shows both traits equally.

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What is the phenotypic ratio of offspring from a heterozygous black mouse (Bb) crossed with a white mouse (bb)?

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2 Black: 2 White (or 1:1 ratio).

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How many children do the parents in generation I have?

Back

5 children.

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What are Alleles?

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Alternative forms of a gene that can exist at a specific locus on a chromosome.

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What is Incomplete Dominance?

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A genetic situation where neither allele is completely dominant, resulting in a blend of traits in the phenotype.

Front

What is the expected percentage of red flowers (RR) from a cross between a red flowered plant (RR) and a white flowered plant (WW) under incomplete dominance?

Back

0%.

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Define Phenotype.

Back

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences.

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Define Genotype.

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The genetic constitution of an individual, specifically the alleles present at a given locus.

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What is a Punnett Square?

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A diagram used to predict the outcome of a particular cross or breeding experiment, showing the possible genotypes of offspring.

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What is a Homozygous genotype?

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A genotype consisting of two identical alleles for a particular gene (e.g., AA or aa).