Multiple Choice
Which of the following is an example of a non-Mendelian pattern of inheritance?
9
views
13. Mendelian Genetics
Non-Mendelian Genetics
Struggling with General Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
A phenotype is controlled by gene A and gene B. Gene B controls the expression of gene A. This is an example of _____.
A
Incomplete Dominance.
B
Epistasis.
C
Codominance.
D
Multifactorial characters.
E
Alleles.
Verified step by step guidance1
Understand the concept of epistasis: Epistasis occurs when the expression of one gene is affected by the presence of one or more 'modifier genes'. In this case, gene B controls the expression of gene A, which is a classic example of epistasis.
Differentiate between the given options: Incomplete dominance, codominance, multifactorial characters, and alleles are different genetic concepts. Incomplete dominance involves a blending of traits, codominance involves both traits being expressed equally, multifactorial characters involve multiple genes and environmental factors, and alleles are different forms of a gene.
Identify the relationship between gene A and gene B: Since gene B controls the expression of gene A, this indicates a hierarchical relationship where one gene affects the expression of another, which is characteristic of epistasis.
Eliminate incorrect options: Incomplete dominance and codominance do not involve one gene controlling another. Multifactorial characters involve multiple genes and environmental factors, not a direct control of one gene over another. Alleles refer to different versions of a gene, not gene interaction.
Conclude that the correct answer is epistasis, as it best describes the scenario where gene B controls the expression of gene A.
Related Videos
Related Practice
Non-Mendelian Genetics practice set
Problem sets built by lead tutorsExpert video explanations