Genetics

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What is Codominance in genetics?

Back

Codominance is a type of inheritance where both alleles in a heterozygous individual contribute to the phenotype, resulting in a phenotype that shows both traits equally, such as red and white fur in RW individuals.

Front

What is the expected phenotypic ratio when crossing two heterozygous parents (Rr x Rr)?

Back

The expected phenotypic ratio is 3:1, where 3 offspring will show the dominant trait and 1 will show the recessive trait.

Front

What is the expected genotypic ratio when crossing two heterozygous parents (Rr x Rr)?

Back

The expected genotypic ratio is 1:2:1, representing 1 homozygous dominant (RR), 2 heterozygous (Rr), and 1 homozygous recessive (rr) offspring.

Front

If T = tall and t = short, what is the chance of getting a short offspring from a TT and tt cross?

Back

The chance of getting a short offspring is 0%, as all offspring will be tall (Tt).

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is the definition of Simple Dominance?

Back

Simple Dominance is a genetic inheritance pattern where one allele (dominant) completely masks the effect of another allele (recessive) in a heterozygous individual.

Front

What is Incomplete Dominance?

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Incomplete Dominance is a type of inheritance where the phenotype of the heterozygote is intermediate between the phenotypes of the two homozygotes, such as red and white flowers producing pink flowers.

Front

What is the probability of obtaining blue flowers from a cross of two green flowered parents (Bb x Bb)?

Back

The probability of obtaining blue flowers is 25%, as the possible genotypes are BB, Bb, Bb, and bb.

Tags

NGSS.HS-LS3-3

Front

What does the term 'phenotype' refer to in genetics?

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Phenotype refers to the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Tags

NGSS.HS-LS4-4

Front

What does the term 'genotype' refer to in genetics?

Back

Genotype refers to the genetic constitution of an individual, specifically the alleles present at a given locus.

Tags

NGSS.HS-LS3-2

Front

What is a Punnett Square used for?

Back

A Punnett Square is a diagram used to predict the genotypes and phenotypes of offspring from a genetic cross.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2