WorksheetsUnderstanding Polygenic Traits in Humans
Total questions: 10
Worksheet time: 20mins
What is polygenic inheritance?
Inheritance controlled by a single gene
Inheritance controlled by multiple genes
Inheritance that follows Mendel's rules
Inheritance that does not involve alleles
Which of the following traits is an example of polygenic inheritance?
Eye color
Blood type
Cystic fibrosis
Sickle cell anemia
How does polygenic inheritance affect the variation of a trait in a population?
It increases variation
It decreases variation
It eliminates variation
It has no effect on variation
Which of the following best describes the distribution of a polygenic trait in a population?
A straight line
A bell-shaped curve
A zigzag pattern
A flat line
If a person is dominant for all alleles controlling height, what is the likely outcome?
The person will be very short
The person will be of average height
The person will be very tall
The person will have no change in height
Which of the following is NOT a polygenic trait?
Skin color
Hair color
Height
Blood type
What does each dominant allele do in polygenic inheritance?
It subtracts from the expression of the next dominant allele
It adds to the expression of the next dominant allele
It cancels out the expression of the next dominant allele
It has no effect on the expression of the next dominant allele
Why can't Mendel's rules fully explain the inheritance of human height?
Because height is controlled by a single gene
Because height is a polygenic trait
Because height does not follow any genetic rules
Because height is not inherited
What is the relationship between the number of genes controlling a trait and the variation of that trait?
More genes lead to less variation
More genes lead to more variation
The number of genes has no effect on variation
Fewer genes lead to more variation
Which of the following statements is true about polygenic traits?
They are controlled by a single gene
They show a limited range of phenotypes
They often result in a continuous range of phenotypes
They follow Mendel's laws of inheritance
