Genetics Quiz: Alleles and Inheritance

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Questions and Answers

What is the relationship between dominant and recessive alleles?

Recessive alleles can overpower dominant alleles under certain conditions.
They have no effect on the phenotype of an organism.
Dominant alleles can completely mask the effect of recessive alleles. (correct)
Both alleles are always expressed equally.

According to the Law of Segregation, what is true about alleles?

One allele is always dominant over the other.
Both alleles are passed to offspring with equal likelihood. (correct)
Alleles are always inherited together.
Only one allele from a parent is passed on to the offspring.

What does the Law of Independent Assortment indicate about genetic traits?

The inheritance of one trait does not affect the inheritance of another. (correct)
Traits are inherited together without any variation.
Dominant traits always influence the inheritance of recessive traits.
All traits are inherited independently of the alleles involved.

Which statement about dominant and recessive traits is correct?

<p>Recessive traits can be expressed in the phenotype only if both alleles are recessive. (B)</p> Signup and view all the answers

How are uppercase letters used in genetics?

<p>To denote dominant alleles. (A)</p> Signup and view all the answers

Flashcards

Dominant Allele

When two versions of a gene (alleles) are present, one allele can be dominant and mask the effects of the other, recessive allele.

Recessive Allele

A version of a gene that is masked by a dominant allele.

Law of Segregation

When an organism inherits two alleles, each has an equal chance of being passed on to its offspring.

Law of Independent Assortment

Different genes are inherited independently of each other.

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Independent Trait Inheritance

A combination of traits that are not connected. For example, a plant can inherit a green seed from a dominant allele and a white flower from a recessive allele.

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