Pedigrees

Question 1

Pedigree analysis

Answer 1

A diagram of a family’s history with a given trait, used with humans

Question 2

Examples of single gene traits in humans

Answer 2

Sickle cell disease, albinism, Huntington Disease

Question 3

Albinism

Answer 3

Missing enzyme for melanin, recessive, epistatic

Question 4

Sickle cell disease

Answer 4

Mutant allele for hemoglobin, recessive, malaria resistance
Dominance is condition dependent

Question 5

Huntington disease

Answer 5

Dominant trait, late onset, nerve cell degeneration, lethal

Question 6

Karyotypes

Answer 6

Image of all chromosomes, allows visibility of chromosome abnormalities

Question 7

Autosomal trait

Answer 7

from a gene not on a sex chromosome

Question 8

Sex-linked trait

Answer 8

From a gene on the X or Y chromosome

Question 9

Under what conditions is sickle cell disease dominant?

Answer 9

Malaria resistance is dominant

Question 10

Under what conditions is sickle cell disease recessive?

Answer 10

At sea level

Question 11

Under what conditions is sickle cell disease incomplete dominant?

Answer 11

The cell concentration at high altitudes

Question 12

Under what conditions is sickle cell disease codominant?

Answer 12

At high altitudes