Heredity

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What is heredity?

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Heredity is the passing of traits from parents to offspring.

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

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What is a genotype?

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A genotype is the genetic makeup of an organism, represented by letters (e.g., Aa, BB).

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NGSS.HS-LS1-1

NGSS.HS-LS3-1

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What is a phenotype?

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A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

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NGSS.HS-LS4-3

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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 an allele?

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An allele is a variant form of a gene that can produce different traits.

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NGSS.HS-LS3-2

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What is incomplete dominance?

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Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a blend of traits (e.g., red and white flowers producing pink flowers).

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What is the significance of the letter 'B' in genetics?

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In genetics, 'B' often represents a dominant allele, while 'b' represents a recessive allele.

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What does it mean for genes to be inherited in pairs?

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Genes are inherited in pairs, meaning one gene comes from each parent, resulting in two alleles for each trait.

Tags

NGSS.HS-LS3-1

Front

What is the difference between dominant and recessive alleles?

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A dominant allele is expressed in the phenotype even if only one copy is present, while a recessive allele is only expressed if two copies are present.