Heredity Practice Test

Front

What is a polygenic trait?

Back

A trait that is influenced by multiple genes, resulting in a wide range of phenotypes, such as human height.

Front

What does Mendel's Law of Segregation state?

Back

Organisms inherit two copies of each gene and donate one copy to each of their offspring.

Front

Why are sex-linked disorders more common in males?

Back

Because the Y chromosome cannot mask alleles on the X chromosome, leading to the expression of recessive traits.

Front

What defines homologous chromosomes?

Back

Homologous chromosomes are chromosomes that have similar genes and structure.

Front

What blood type is not possible for children of a Type A man and a Type AB woman?

Back

Type O blood is not possible because both parents do not have the necessary alleles.

Front

What is the difference between autosomal and sex-linked traits?

Back

Autosomal traits are located on non-sex chromosomes, while sex-linked traits are located on sex chromosomes (X or Y).

Front

What is codominance?

Back

A genetic scenario where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive.

Front

What is the significance of Mendel's Law of Independent Assortment?

Back

It states that the alleles for different traits segregate independently of one another during gamete formation.

Front

What is a genotype?

Back

The genetic makeup of an organism, representing the alleles inherited from its parents.

Front

What is a phenotype?

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.