SC.7.L.16.1- Heredity/Genetics

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What is heredity?

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Heredity is the passing of traits from parents to offspring through genes.

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What are alleles?

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Alleles are different forms of a gene that determine specific traits.

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What is a Punnett square?

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A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

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What does homozygous mean?

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Homozygous refers to having two identical alleles for a particular gene (e.g., AA or aa).

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What does heterozygous mean?

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Heterozygous refers to having two different alleles for a particular gene (e.g., Aa).

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What is a dominant trait?

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A dominant trait is a trait that is expressed when at least one dominant allele is present.

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What is a recessive trait?

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A recessive trait is a trait that is only expressed when two recessive alleles are present.

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How many chromosomes do humans have?

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Humans have 46 chromosomes, with 23 pairs.

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What are sex cells?

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Sex cells, or gametes, are reproductive cells (sperm and eggs) that contain half the number of chromosomes (23 in humans).

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What is a genotype?

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A genotype is the genetic makeup of an organism, represented by the alleles it possesses.