Port Washington Genetics since Mendel

What is incomplete dominance?

• A type of genetic inheritance where the phenotype is a blend of both alleles.

• A situation where one allele completely masks the other.

• A condition where both alleles are equally expressed.

• A genetic scenario where neither allele is expressed.

Explain multiple alleles or codominance.

• Multiple alleles refer to the presence of more than two alleles for a genetic trait, while codominance occurs when both alleles in a heterozygous organism are fully expressed.

• Multiple alleles and codominance are the same genetic concept.

• Codominance refers to the presence of more than two alleles for a genetic trait, while multiple alleles occur when both alleles in a heterozygous organism are fully expressed.

• Multiple alleles and codominance do not occur in nature.

Polygenic inheritance involves the interaction of multiple genes. Which of the following best describes this concept?

• Inheritance controlled by a single gene

• Inheritance controlled by multiple genes

• Inheritance that does not involve genes

• Inheritance that is random

Tags

NGSS.HS-LS4-3

In the genetic cross diagram, what is the phenotype of the offspring with the genotype 'RW'?

• The phenotype of the offspring with the genotype 'RW' is pink

• The phenotype of the offspring with the genotype 'RW' is always red.

• The phenotype of the offspring with the genotype 'RW' is always white.

• The phenotype of the offspring with the genotype 'RW' is a blend of red and white.

Tags

NGSS.HS-LS3-1

In 4-o'clock plants, the crossing of red-and white-flowered pure parental stocks produced pink-flowered plants. This type of genotypic expression is known as:

• Dominance

• Co-dominance

• Incomplete dominance

• Gene polymorphism

What is codominance?

• A genetic scenario where both alleles are expressed equally in the phenotype.

• A situation where one allele completely masks the other.

• A condition where neither allele is expressed in the phenotype.

• A genetic condition where alleles blend to form an intermediate phenotype.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following is an example of codominance?

• Red flowers

• White flowers

• Roan cattle

• Black cattle

In the context of roan cattle, what does the genetic notation 'RW' signify?

• Red and white coat color

• Black coat color

• White coat color

• Brown coat color

Tags

NGSS.HS-LS3-1

Fill in the blank: Codominance is a pattern of inheritance in which the phenotypes produced by both alleles are _______.

• completely expressed

• partially expressed

• not expressed

• alternately expressed

Fill in the blank: Incomplete dominance is a pattern of inheritance in which one allele is not completely _______ over another allele.

• dominant

• recessive

• neutral

• absent