Heredity and Genetics Answers

Which of the following statements BEST describes DNA? A. DNA are the same as genes. B. All living things contain DNA. C. There are three bases that compose DNA. D. Billions of people in the world have the same genetic code. Please select the best answer from the choices provided.

When describing Down syndrome, it's important to note that __________.A.it can be classified as a single-gene disorderB.it is caused when red blood cells cannot properly form hemoglobinC.it causes infected males to have low testosterone levelsD.it is usually caused by three copies of chromosome 21

Dominant traits include __________.A.cleft chin and attached earlobesB.dimples and attached earlobesC.dimples and no widow's peakD.cleft chin and free earlobes

Gene therapy is a process whereby normal genes are injected to replace abnormal genes. Please select the best answer from the choices provided.

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

Which of the following are types of hereditary disorders?A.single-gene and chromosomalB.complex and duplexC.single-gene and duplexD.all of the above

Heredity refers to the __________.A.removal of DNA from the human bodyB.formation of chromosomes from DNAC.many types of female genesD.passing of traits from parents to children

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

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

Chromosomes are composed of DNA.