Heredity and Punnett Squares

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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 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 dominant mean in genetics?

Back

A dominant allele is one that expresses its trait even when only one copy is present in the genotype.

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What does recessive mean in genetics?

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A recessive allele is one that only expresses its trait when two copies are present in the genotype.

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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.

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What is a phenotype?

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A phenotype is the physical appearance or visible traits of an organism.

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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., TT or tt).

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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., Tt).

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If a tall pea plant (Tt) is crossed with a short pea plant (tt), what is the probability of getting a tall plant?

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50% of the offspring will be tall (Tt) and 50% will be short (tt).

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What is the significance of the letter 'T' in genetics?

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The letter 'T' typically represents the dominant allele for tallness in pea plants.