Ch 16 Beyond Mendel

Question 1

Codominance

Answer 1

When two alleles at one locus produce phenotypes that are both present
Like the AB blood type

Question 2

Does the environment influence phenotype?

Answer 2

Yes for example bunnies that an enzyme in bunnies that produces dark fur is inactive at high temps

Question 3

Sex Chromosomes

Answer 3

Female has 2 X and Male has 1 X and 1 Y

Question 4

Nondisjunction in Meiosis

Answer 4

homologous chromosomes fail t separate in meiosis 1 or sister chromatids fail to separate in meiosis 2

Question 5

What is the SRY gene?

Answer 5

sex determine region on Y chromosome and if present the embryo will develop testes

Question 6

What is a linked gene?

Answer 6

Genes that go together

Question 7

Map unit is

Answer 7

number of recombinant/total offspring

Question 8

How is mitochondrial DNA inherited?

Answer 8

only encoded maternally

Question 9

What is a Haplotype?

Answer 9

Unique combination of alleles (or sequences) that’s are inherited together

Question 10

How does recombination affect linked genes?

Answer 10

Two very close-together genes will have very few recombination events and be tightly linked, while two genes that are slightly further apart will have more recombination events and be less tightly linked.