Genetics, Punnett Squares, Incomplete Dominance

What is Mendelian genetics?

• A type of cooking technique used in French cuisine

• The study of rock formations

• A type of flower found in the Amazon rainforest

• Principles of inheritance discovered by Gregor Mendel

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Explain the concept of Punnett square.

• A type of crossword puzzle related to genetics

• A tool used to measure genetic mutations

• A method for predicting the weather based on genetic traits

• A diagram used to predict the possible genotypes of offspring in a genetic cross.

Define genotype and give an example.

• Genotype is the physical characteristics of an organism. For example, the genotype for flower color in pea plants can be represented as PP (for purple flowers) or pp (for white flowers).

• The correct answer is: Genotype is the genetic makeup of an organism. For example, the genotype for flower color in pea plants can be represented as PP (for purple flowers) or pp (for white flowers).

• Genotype is the result of environmental factors on an organism. For example, the genotype for flower color in pea plants can be represented as PP (for purple flowers) or pp (for white flowers).

• Genotype is the same as phenotype. For example, the genotype for flower color in pea plants can be represented as PP (for purple flowers) or pp (for white flowers).

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What is phenotype and how is it different from genotype?

• Phenotype and genotype are the same thing.

• Phenotype is the physical characteristics, while genotype is the genetic makeup.

• Phenotype is the genetic makeup, while genotype is the physical characteristics.

• Phenotype is only relevant in plants, while genotype is only relevant in animals.

Differentiate between homozygous and heterozygous genotypes.

• Homozygous genotype has two different alleles

• Heterozygous genotype has two identical alleles

• Homozygous genotype has three identical alleles

• Homozygous genotype has two identical alleles, while heterozygous genotype has two different alleles.

Explain incomplete dominance with an example.

• Incomplete dominance is when one allele is completely dominant over the other, resulting in a blended phenotype.

• Incomplete dominance is when one allele is not completely dominant over the other, resulting in a blended phenotype. For example, in snapdragons, the allele for red flowers and the allele for white flowers exhibit incomplete dominance, resulting in pink flowers when the two alleles are present.

• Incomplete dominance is when both alleles are completely dominant, resulting in a blended phenotype.

• Incomplete dominance is when one allele is completely recessive, resulting in a blended phenotype.

If a pea plant with genotype Rr is crossed with another pea plant with genotype rr, what is the probability of their offspring having the genotype rr?

• 75%

• 100%

• 50%

• 25%

If a cat with genotype Bb is crossed with another cat with genotype bb, what is the probability of their offspring having the genotype Bb?

• 75%

• 100%

• 50%

• 25%

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NGSS.HS-LS3-3

If a flower with incomplete dominance has a red allele (R) and a white allele (W), what would be the phenotype of a flower with genotype RW?

• Pink

• White

• Red

• Blue

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NGSS.HS-LS3-1

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In a cross between two heterozygous parents (Rr), what is the probability of their offspring having the genotype rr?

• 50%

• 10%

• 75%

• 25%

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