Non-Mendelian Genetics

Let's recall

Multiple Choice

Which of the following phenomena is an example of non-Mendelian inheritance?

• Inheritance of blood type

• Inheritance of attached earlobes

• Inheritance of widow's peak

• Inheritance of freckles

Multiple Choice

In incomplete dominance, what is the phenotype of heterozygous individuals?

• Phenotype identical to one of the parents

• Intermediate phenotype between the two homozygous parents

• Phenotype different from both homozygous parents

• Dominant phenotype

Multiple Choice

Which of the following genetic phenomena involves the expression of more than one allele at a single locus?

• Incomplete dominance

• Codominance

• Multiple Alleles

• Complete Dominance

Multiple Choice

In codominance, what is the phenotype of heterozygous individuals?

• Phenotype identical to one of the parents

• Intermediate phenotype between the two homozygous parents

• Phenotype showing characteristics of both homozygous parents

• Phenotype different from both homozygous parents

Multiple Choice

In a population of snapdragons, flower color is determined by a single gene with two alleles: R (for red) and W (for white). When a plant with red flowers (RR) is crossed with a plant with white flowers (WW), the offspring display pink flowers (RW).

If two pink-flowered snapdragons (RW) are crossed, what are the expected phenotypic and genotypic ratios of their offspring?

• GR: 1:2:1

  PR: 3:1

• GR: 1:2:1

  PR: 1:2:1

• GR: 2:2

  PR: 2:2

• GR: 3:1

  PR: 1:2:1

Multiple Choice

In a population of cattle, coat color is determined by a single gene with two alleles: R (for red) and W (for white). These two alleles produce a roan phenotype, where both red and white hairs are equally expressed in the coat.

If a heterozygous roan bull (RW) is crossed with a white cow (WW), what are the expected phenotypic and genotypic ratios of their offspring?

• GR: 1:2:1

  PR: 3:1

• GR: 3:1

  PR: 1:2:1

• GR: 2:2

  PR: 3:1

• GR: 2:2

  PR: 1:2:1

Multiple Choice

In humans, the ABO blood type system is determined by three alleles: IA, IB, and i. IA and IB are codominant, while i is recessive. A woman with blood type AB (IAIB) marries a man with blood type O (ii). What are the possible blood types of their children?

• A, B, O

• A, B

• A only

• B only

Open Ended

What is the genotypic and phenotypic ratio?

Open Ended

What is the Genotypic and Phenotypic ratio?

Open Ended

What is the genotypic and phenotypic ratio?

Open Ended

1. 1. Draw a pedigree chart and place the genotypes for each individuals

2. 2. Prove using a Punnett square who among the offsprings is not the couple's real child.

Multiple Choice

In incomplete dominance, what is the phenotype of heterozygous individuals?

• Phenotype identical to one of the parents

• Intermediate phenotype between the two homozygous parents

• Phenotype different from both homozygous parents

• Dominant phenotype

Multiple Choice

Which of the following phenomena is an example of non-Mendelian inheritance?

• Inheritance of blood type

• Inheritance of attached earlobes

• Inheritance of widow's peak

• Inheritance of freckles

Multiple Choice

Which of the following genetic phenomena involves the expression of more than one allele at a single locus?

• Incomplete dominance

• Codominance

• Multiple Alleles

• Complete Dominance

Multiple Choice

In codominance, what is the phenotype of heterozygous individuals?

• Phenotype identical to one of the parents

• Intermediate phenotype between the two homozygous parents

• Phenotype showing characteristics of both homozygous parents

• Phenotype different from both homozygous parents

Multiple Choice

In a population of snapdragons, flower color is determined by a single gene with two alleles: R (for red) and W (for white). When a plant with red flowers (RR) is crossed with a plant with white flowers (WW), the offspring display pink flowers (RW).

If two pink-flowered snapdragons (RW) are crossed, what are the expected phenotypic and genotypic ratios of their offspring?

• GR: 1:2:1

  PR: 3:1

• GR: 1:2:1

  PR: 1:2:1

• GR: 2:2

  PR: 2:2

• GR: 3:1

  PR: 1:2:1

Multiple Choice

In a population of cattle, coat color is determined by a single gene with two alleles: R (for red) and W (for white). These two alleles produce a roan phenotype, where both red and white hairs are equally expressed in the coat.

If a heterozygous roan bull (RW) is crossed with a white cow (WW), what are the expected phenotypic and genotypic ratios of their offspring?

• GR: 1:2:1

  PR: 3:1

• GR: 3:1

  PR: 1:2:1

• GR: 2:2

  PR: 3:1

• GR: 2:2

  PR: 1:2:1

Multiple Choice

In humans, the ABO blood type system is determined by three alleles: IA, IB, and i. IA and IB are codominant, while i is recessive. A woman with blood type AB (IAIB) marries a man with blood type O (ii). What are the possible blood types of their children?

• A, B, O

• A, B

• A only

• B only