Non-Mendelian Genetics

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What is Non-Mendelian Genetics?

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Non-Mendelian Genetics refers to patterns of inheritance that do not follow Mendel's laws of inheritance, including incomplete dominance, codominance, and multiple alleles.

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What is a pedigree chart?

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A pedigree chart is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.

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What does it mean if a trait is dominant?

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A dominant trait is one that is expressed in the phenotype even when only one copy of the allele is present.

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What does it mean if a trait is recessive?

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A recessive trait is one that is only expressed in the phenotype when two copies of the allele are present.

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What is incomplete dominance?

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Incomplete dominance is a genetic situation in which one allele does not completely dominate another allele, resulting in a new phenotype that is a blend of the two.

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What is codominance?

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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.

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What is the genotype of an individual with a recessive trait?

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The genotype of an individual with a recessive trait must be homozygous recessive (hh).

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How can you determine if a trait is autosomal recessive from a pedigree?

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If the trait skips generations and is only expressed when both parents are carriers, it is likely autosomal recessive.

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What is the difference between genotype and phenotype?

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Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable characteristics or traits.

Tags

NGSS.HS-LS1-1

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What is a carrier in genetics?

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A carrier is an individual who has one copy of a recessive allele that does not manifest in the phenotype but can be passed to offspring.

Tags

NGSS.HS-LS3-1