Sex-linked Trait – Flashcards
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Sex-linked Trait
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A trait that is determined by a gene on the X or Y chromosome.
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Sex Chromosomes
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Chromosomes that determine the sex of the organism (X or Y in humans).
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XX
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Female genotype.
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XY
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Male genotype.
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Autosomes
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Non-sex chromosomes, pairs #1-22 in humans.
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Karyotype
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Picture of the homologous chromosomes.
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Carrier
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Having a copy of a normal gene and a copy of the recessive-affected gene but not having the disorder.
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Chromosome Theory of Inheritance
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Theory proposed by Sutton and Boveri stating that chromosomes carry genes.
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Homologous Chromosomes
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A pair of matching chromosomes in an organism, with one being inherited from each parent. Autosomes 1-22 are homologous.
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Sex-linked Trait Punnett Square
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Recessive trait will show if two recessive genes in female or one recessive gene on the X chromosome in males.
