Extension of Mendelian Quiz

What is the concept of incomplete dominance in genetics?

• Incomplete dominance is when one allele completely dominates over the other

• Incomplete dominance is when the dominant allele is not expressed

• Incomplete dominance is when both alleles are recessive

• Incomplete dominance is a genetic concept where neither allele is completely dominant over the other, resulting in a blending of traits in the heterozygous condition.

Explain the concept of codominance and provide an example.

• Codominance is when one allele completely masks the expression of another allele, resulting in a heterozygous phenotype.

• An example of codominance is the ABO blood group system, where the A and B alleles are both fully expressed, resulting in the AB blood type.

• Codominance is the blending of two alleles to create an intermediate phenotype, such as in the case of pink flowers from a cross between red and white flowers.

• An example of codominance is the ABO blood group system, where the A allele is dominant over the B allele, resulting in the A blood type.

Define multiple alleles and provide an example.

• Multiple alleles refer to the existence of only one allele for a particular gene in a population

• An example of multiple alleles is the presence of two alleles for eye color in humans

• Multiple alleles refer to the existence of more than two alleles for a particular gene in a population. An example is the ABO blood group system, where there are three alleles (IA, IB, i) that determine the blood type.

• Multiple alleles are only found in plants, not in animals

Explain the concept of polygenic inheritance.

• Polygenic inheritance is the inheritance of a trait controlled by a combination of genetic and non-genetic factors

• Polygenic inheritance is the inheritance of a trait controlled by environmental factors only

• Polygenic inheritance is the inheritance of a trait controlled by a single gene

• Polygenic inheritance is the inheritance of a trait that is controlled by two or more genes, and each gene may have multiple alleles.

Describe the concept of epistasis and provide an example.

• Epistasis is a form of ancient Greek philosophy

• Epistasis is a type of flower in the daisy family

• Epistasis is a type of weather phenomenon

• Epistasis is a genetic interaction where the effect of one gene is modified by one or several other genes. An example is the coat color in Labrador retrievers, where the gene for coat color (B) is epistatic to the gene for pigment deposition (E).

Explain the phenomenon of pleiotropy in genetics.

• Pleiotropy is the phenomenon in genetics where a single gene affects the genotype but not the phenotype.

• Pleiotropy is the phenomenon in genetics where a single gene has no effect on an organism's phenotype.

• Pleiotropy is the phenomenon in genetics where a single gene only has one effect on an organism's phenotype.

• Pleiotropy is the phenomenon in genetics where a single gene has multiple effects on an organism's phenotype.

Discuss the impact of the extension of Mendelian genetics on agriculture and breeding practices.

• Mendelian genetics only applies to human genetics, not agriculture

• The extension of Mendelian genetics has led to a decrease in agricultural productivity and breeding practices

• The extension of Mendelian genetics has no impact on agriculture and breeding practices

• The extension of Mendelian genetics has greatly improved agricultural productivity and breeding practices by allowing for the selection and breeding of desirable traits in plants and animals, leading to the development of high-yielding and disease-resistant varieties.