13 Questions
In polygenic inheritance, how do polygenic traits differ from Mendelian traits?
Polygenic traits are controlled by three or more genes, while Mendelian traits are controlled by a single gene.
Using the example of human skin color, how does the genotype AABBCC relate to skin color?
It results in the darkest skin color.
What determines the darkness or lightness of an individual's skin color in the context of polygenic inheritance?
The specific combinations of alleles present in the individual's genotype.
How does the presence of recessive alleles affect an individual's skin color in polygenic inheritance?
It lightens the skin color.
Why is human skin color a classic example of polygenic inheritance?
Because it is influenced by both genes and the environment.
What role do genes play in determining polygenic traits?
Genes interact with each other and contribute additively to the phenotype.
How does an individual's genotype affect their skin color in polygenic inheritance?
Different combinations of alleles result in varying shades of skin color.
What effect does the presence of three dominant alleles have on an individual's skin color?
It darkens the skin color.
'Polygenic' refers to traits controlled by:
Three or more genes
Which statement best describes polygenic inheritance?
It involves the interaction of three or more genes to control a trait.
How does the genotype AABBCC contribute to an individual's skin color?
It results in the darkest skin color due to the presence of all dominant alleles.
Why is human skin color mentioned as a classic example of polygenic inheritance?
Because it shows the additive effect of multiple genes on a trait's expression.
What distinguishes polygenic traits from Mendelian traits?
Mendelian traits result in discrete phenotypes, while polygenic traits lead to a range of phenotypes.
Test your knowledge on traits controlled by three or more genes that are spread across a gradient, such as height in humans. Explore the concept of polygenic inheritance and how it differs from traits with distinct alternate forms.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
