Ch. 12 Genetic Disorders

8 terms by Maria01 

Create a new folder

Advertisement Upgrade to remove ads

Cystic Fibrosis

1 in 3500 - one of the most common recessive genetic disorders among Caucasians which affects the mucus-producing glands, digestive enzymes, and sweat glands. Cause: The gene that codes for a membrane protein is defective. Effect: Excessive mucus production and digestive and respiratory failure. Cure/Treatment: No cure, Daily cleaning of mucus from the lungs. Mucus - thinning drugs. Pancreatic enzyme supplements.
the most common congenital disease; the child's lungs and intestines and pancreas become clogged with thick mucus; caused by defect in a single gene; no cure is known.

Simple Dominant Traits

traits that appear in the F1 generation

Tay-Sachs Disease

1 in 2500 - recessive genetic disorder. Often identified by a cherry-red spot on the back of the eye and is predominant among Jews of eastern European descent. affects people of Jewish descent - Cause: Absence of a necessary enzyme that breaks down fatty substances. Effect: Buildup of fatty deposits in brain inflates nerve cells and causes mental disabilities.

Huntington's Disease

a dominant genetic disorder that affects the nervous system and occurs in one out of 10,000 people in the U.S. The symptoms first appear between 30 and 50 yrs. old. Symptoms: gradual loss of brain function, uncontrollable movements, and emotional disturbances. Genetic tests are available to detect this dominant allele. No cure or treatment.

Phenyl Ketonuria

a genetic disorder of metabolism; lack of the enzyme needed to turn phenylalanine into tyrosine results in an accumulation of phenylalanine in the body fluids which causes various degrees of mental deficiency. an inborn error of metabolism caused by the lack of an enzyme, resulting in abnormally high levels of the amino acid phenylalanine; untreated, PKU can lead to severe, progressive mental retardation.

Hemophilia

congenital tendency to uncontrolled bleeding; usually affects males and is transmitted from mother to son. is a group of hereditary genetic disorders that impair the body's ability to control blood clotting or coagulation, which is used to stop bleeding when a blood vessel is broken. ...

Dominant vs. Recessive

Dominant: Mendel's name for a specific trait that appeared in the F1 generation. Recessive: Mendel's name for a specific trait hidden or masked in the F1 generation.

Punnett Square

a diagram that is used to predict an outcome of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach, and is used by biologists to determine the probability of an offspring having a particular genotype.A learning tool for determining the possible outcomes of a given cross between individuals. It was developed by RC Punnett, an early British geneticist.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set