Unit 5 Review

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11 Terms

1
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Meiosis

Process where specialized diploid cells divide into 4 haploid cells, each with half the number of chromosomes, producing gametes like eggs and sperm.

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Mendelian Genetics

Study of inheritance patterns in offspring from parental crosses, following laws like segregation and independent assortment proposed by Gregor Mendel.

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Law of Segregation

Principle stating that alleles separate during gamete formation, leading to a 1:2 ratio of genotypes in offspring.

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Law of Independent Assortment

Concept that alleles of different genes segregate independently during gamete formation.

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Huntington’s Disease

Genetic disorder causing nerve degeneration, uncontrollable movements, and often fatal outcomes.

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Non-Mendelian Genetics

Inheritance patterns that do not adhere to Mendel's laws, including phenomena like incomplete dominance, codominance, and epistasis.

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Sex-linked vs

Sex-linked diseases mainly affect one sex more than the other and can skip generations, while autosomal diseases affect both sexes equally.

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Dominant Trait

Trait expressed when inherited from one parent, often visible in the phenotype.

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Recessive Trait

Trait expressed only when inherited from both parents, typically masked by dominant traits.

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Epistasis

Interaction between genes where the phenotype of one gene affects the expression of another gene.

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Polygenic Inheritance

Inheritance pattern where multiple genes contribute to a single trait, such as height or eye color.