Exam 12: Units of Heredity: Chromosomes and Inheritance

A person who is heterozygous for the Huntington disease (HD)allele has offspring with someone who does not have HD.What proportion of their children will have HD?

Why do X-linked conditions appear more frequently in males than in females?

When a fragment breaks from a chromosome and rejoins it,in a flipped orientation,the result is called a/an:

Which of the following genetic disorders is caused by a dominant allele but does not produce symptoms until the affected individual is well into adulthood?

Which of the following combinations of chromosomes would be found in a person afflicted with Turner syndrome?

Cri-du-chat syndrome babies are mentally challenged and have an abnormal larynx that makes sounds like the cry of a cat.This disorder is due to a/an:

A woman is missing one of her X chromosomes.With which of the following conditions would she be diagnosed?

Which of the following is a transfer of genes between non-homologous chromosomes?

Which condition or disease is caused by aneuploidy?

________ is the condition when an individual has three copies of chromosome 21.

If more than one sperm fertilizes an egg,which of the following can result?

A person who has a recessive disorder but does not have the disorder him or herself is said to be a/an:

A study of several pedigrees demonstrates that two parents are normal.If some of their children express a trait,then the trait is controlled by a:

A pedigree is a representation of:

A karyotype you are viewing shows an extra piece of chromosome 1 attached to chromosome 22.What type of abnormality caused this?

If one of your parents has Huntington disease and is heterozygous for the disorder,you have a 50 percent chance of inheriting the disease.

What percent of males have some degree of color blindness?

Nondisjunction in somatic cells can result in aneuploid cells.This may give rise to:

What condition is caused by a dominant allele of a single gene?

Phenylketonuria is the most commonly inherited genetic disorder that affects nervous system development.It occurs in 1 out of every 10,000 births in the United States and Europe.How would you design a study to determine if phenylketonuria is an autosomal dominant or autosomal recessive disorder? How would you be able to determine if it is dominant or recessive?