15.2 Human Genetic Disorders

Question 1

What is nondisjunction?

Answer 1

error in meiosis; when chromosomes fail to seperate

Question 2

What is Turner’s Syndrome?

Answer 2

A nondisjunction on the X chromosome

Question 3

What is Kleinfeilder’s Syndrome?

Answer 3

An extra X chromosome for males

Question 4

When does nondisjunction happen?

Answer 4

Meiosis 1 and 2

Question 5

Changes in a gene’s DNA sequence can change proteins by altering their ______ sequences, which may directly affect an individual’s _______.

Answer 5

amino acids, phenotype

Question 6

What is sickle cell disease?

Answer 6

A mutation in the beta-goblin gene - makes red blood cells a sickle shape

Question 7

T or F: Sickle cell is hereditary and is recessive

Answer 7

True

Question 8

What is Cystic Fibrosis?

Answer 8

is a result of a deletion of three bases in a gene called CFTR

Question 9

What is the amino acid lost in CF?

Answer 9

phenylalanine

Question 10

Is CF recessive or dominant?

Answer 10

recessive

Question 11

What is Huntington’s Disease?

Answer 11

the amino acid glutamine that repeats over and over again

Question 12

What does the CF allele help prevent?

Answer 12

Typhoid Fever

Question 13

What does SC allele help prevent?

Answer 13

Malaria