Exam 37: A: Genetics and Heredity

Tay-Sachs disease is a dominant condition involving failure to make a lipid-producing enzyme.

Each offspring from a single set of parents is likely to be genetically unique.

By restricting fat intake,persons with Tay-Sachs disease can successfully manage the disease.

The ultimate goal behind gene augmentation is to change existing body cells.

Chromatin and chromosomes are both forms of DNA.

There is no such thing as a homozygous color-blind female.

Klinefelter syndrome can be treated with reproductive and growth hormones.

A Punnett square or a pedigree can only predict the probability or possibility of passing on a trait to an offspring.

Statistical evidence supports a link between time of insemination and the sex of the offspring.

Thalassemia is an example of a chromosomal abnormality involving trisomy of the 23rd chromosome.

A missing part of the q-arm of the Y chromosome may cause an inherited problem with spermatogenesis and possible infertility.

All congenital disorders are inherited disorders.

The sickle-cell gene produces an abnormal protein chain in the hemoglobin molecule.

People who inherit the gene for hemophilia have an increased risk factor for a blood clotting disease that will express itself in the correct environmental conditions.

Xeroderma pigmentosum is a genetic disease that affects the ability to form pigments in the eye,leading to color blindness.

In a pedigree,a completely empty square would indicate a male that had the trait.

Every cell in the human body,both male and female,contains 46 chromosomes.

RNA interference,or iRNA,is being studied as a way to treat genetic disorders.

Phenylketonuria is caused by dominant genes that fail to produce the enzyme phenylalanine hydroxylase.

The genotype XXY results in Turner syndrome.