Mendelian Genetics

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What is Mendelian Genetics?

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Mendelian Genetics is the study of how traits are inherited through generations, based on the principles established by Gregor Mendel.

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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 both genetic makeup and environmental influences.

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What is a genotype?

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A genotype is the genetic constitution of an individual, specifically the alleles present for a particular gene.

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What is a dominant allele?

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

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What is a recessive allele?

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

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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 from the parents.

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What is a dihybrid cross?

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A dihybrid cross is a genetic cross that examines the inheritance of two different traits, each represented by two alleles.

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What is the phenotypic ratio of a dihybrid cross of two heterozygous parents?

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The phenotypic ratio is 9:3:3:1.

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What does homozygous mean?

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Homozygous refers to having two identical alleles for a particular gene, either dominant or recessive.

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What does heterozygous mean?

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Heterozygous refers to having two different alleles for a particular gene.