Heredity Practice for Test IBMYP

Front

What is heredity?

Back

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

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What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by alleles (e.g., AA, Aa, aa).

Front

What is a phenotype?

Back

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

Front

What is a monohybrid cross?

Back

A monohybrid cross is a genetic cross between individuals that differ in one trait.

Front

What is a dihybrid cross?

Back

A dihybrid cross is a genetic cross between individuals that differ in two traits.

Front

What does homozygous mean?

Back

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

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What does heterozygous mean?

Back

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

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What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present (e.g., A in Aa).

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What is a recessive allele?

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A recessive allele is an allele that expresses its trait only when two copies are present (e.g., aa).

Front

What is a mutation?

Back

A mutation is a change in the DNA sequence that can lead to changes in traits.