U6 Genetics

Front

What is an allele?

Back

An allele is one form of a gene that can exist at a specific locus on a chromosome.

Front

What does a Punnett square represent?

Back

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.

Front

What is a homozygous genotype?

Back

A homozygous genotype consists of two identical alleles for a particular gene, such as YY or yy.

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What is a heterozygous genotype?

Back

A heterozygous genotype consists of two different alleles for a particular gene, such as Yy.

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What does incomplete dominance mean?

Back

Incomplete dominance occurs when the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

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What are genotypes?

Back

Genotypes are 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 observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is the significance of dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous individuals, determining the phenotype.

Front

How do you calculate the probability of genotypes in a genetic cross?

Back

The probability of genotypes can be calculated using a Punnett square, which shows the possible allele combinations from the parents.

Front

What does it mean for a trait to be expressed equally?

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When traits are expressed equally, it means that both alleles contribute to the phenotype, as seen in codominance.