Heredity and Genetics

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Chromosomes are composed of DNA.

T

Genetic research and testing includes __________.

All of the above

Which of the following statements BEST describes chromosomes?

Chromosomes carry the codes for hereditary traits.

Genes are segments of a chromosome that are responsible for specific hereditary traits.

T

Amniocentesis is a test in which fluid is removed from the uterus so the baby’s genetic composition can be determined.

T

Complex diseases are caused by imperfections in multiple genes.

T

Gene testing is foolproof since it scans the building blocks of humans.

F

Gene therapy is a commonly used process whereby normal genes are injected to replace abnormal genes.

T

Sickle cell anemia is most common in people of Northern European descent.

F

Understanding and anticipating genetic disorders can help to manage hereditary diseases.

T

Discuss the general causes of chromosomal diseases.

Chromosomal diseases occur when an abnormality occurs. These could include either the wrong number of chromosomes or an incomplete chromosome.

Complex genetic diseases are different from single-gene diseases because they __________.

Are caused by mutations to multiple genes

Explain the causes and symptoms of sickle cell anemia.

Sickle cell anemia is caused by the red blood cells’ inability to properly form hemoglobin. The result is an inability to transfer oxygen and blood throughout the body.

Hereditary diseases are passed from one generation to the next through mutated genes.

T

Gene testing is foolproof since it scans the building blocks of humans.

False

The Human Genome Project __________.

was completed in 2003

When describing Down syndrome, it’s important to note that __________.

it is usually caused by three copies of chromosome 21

Dominant traits include __________.

cleft chin and free earlobes

Which of the following statements BEST describes chromosomes?

Chromosomes carry the codes for hereditary traits.

Gene therapy is a commonly used process whereby normal genes are injected to replace abnormal genes.

True

The normal function of a gene is to __________.

encode a protein

Which of the following statements BEST describes DNA?

All living things contain DNA.

Heredity refers to the __________.

passing of traits from parents to children

Genes are segments of a chromosome that are responsible for specific hereditary traits.

True

Genetic research and testing includes __________.

all of the above

Sickle cell anemia is most common in people of Northern European descent.

False

Cystic fibrosis is a disease that __________.

makes it difficult to breathe

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