Inheritance TEST REVIEW

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What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive. Example: Roan cows have both red and white hair.

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What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a phenotype that is a blend of the two. Example: A red flower crossed with a white flower produces pink flowers.

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What is the phenotype of an individual with cystic fibrosis?

Back

The phenotype of an individual with cystic fibrosis is affected, meaning they express the symptoms of the disease.

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What is the phenotype of a carrier for cystic fibrosis?

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The phenotype of a carrier for cystic fibrosis is normal, meaning they do not express the disease but carry one recessive allele.

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What is the genotype for an individual with Huntington's Disease?

Back

The genotype for an individual with Huntington's Disease can be either HH (homozygous dominant) or Hh (heterozygous).

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What is the genotype for an individual without Huntington's Disease?

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The genotype for an individual without Huntington's Disease is hh (homozygous recessive).

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What are multiple alleles?

Back

Multiple alleles refer to the presence of more than two alleles for a genetic trait. Example: Human blood type has three alleles: A, B, and O.

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What is complete dominance?

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Complete dominance is a genetic scenario where one allele completely masks the effect of another allele in a heterozygote. Example: In pea plants, the allele for tall stems (T) completely dominates the allele for short stems (t).

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What is polygenic inheritance?

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Polygenic inheritance is a type of inheritance where multiple genes influence a single trait. Example: Human height is determined by several genes.

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What is a genotype?

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A genotype is the genetic makeup of an individual, represented by the alleles they possess for a particular trait.