UMass Amherst BIOLOGY 283 - Genetics Study Guide Exam 2 (8 pages)

Previewing pages 1, 2, 3 of 8 page document View the full content.
View Full Document

Genetics Study Guide Exam 2



Previewing pages 1, 2, 3 of actual document.

View the full content.
View Full Document
View Full Document

Genetics Study Guide Exam 2

59 views


Pages:
8
School:
University of Massachusetts Amherst
Course:
Biology 283 - General Genetics
General Genetics Documents

Unformatted text preview:

Genetics Study Guide Exam 2 Chapter 4 Hemizygous XY Homozygous XX Y Chromosome Male specific genes are found on it lacks copies of genes found on the X chromosome Sex Linked genes are found on one of the two sex chromosomes not both X linked most likely to affect males Y linked Relatively few genes referred to as holandric genes transmitted only from father to son Pseudoautosomal inheritance refers to the very few genes found on both X and Y chromosomes X Linked Conditions Color Blindness deutan type Insensitivity to Green Light Color Blindness Protan type Insensitivity to Red Light Fabry s disease Deficiency in galactosidase A Heart and kidney defects early death G 6 PD deficiency Severe anemic reactions following intake of primarques in drugs and foods fava beans Hemophilia A Classic form of clotting deficiency Clotting factor VIII Hemophilia B Christmas diseases deficiency of clotting factor IX Hunter syndrome Mucopolysaccharide storage disease Short stature claw like fingers coarse facial features slow mental deterioration and deafness Ichthyosis Scaly dry skin on extremities Lesch Nyhan syndrome HPRT deficiency Motor and mental retardation self mutilation and early death Duchenne muscular dystrophy Progressive life shortening disorder Muscle degeneration and weakness mental retardation Lethal X Linked recessive disorders Only in males females can only be heterozygous carriers Ex Duchenne muscular dystrophy A man with Duchenne muscular dystrophy must have inherited it from his mother Bc he only has one X chromosome which he gets from mom he would only pass it to his daughters Sex influenced traits Traits where an allele is dominant in one sex but recessive in the opposite sex heterozygote phenomenon Sex influenced does not mean sex linked Sex influenced are autosomal Sex Limited inheritance Traits that only occur in one of the two sexes Genes are controlled by sex hormones or the sexual development pathway Ex In humans ovary development is limited to females Ex



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Genetics Study Guide Exam 2 and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Genetics Study Guide Exam 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?