Inheritance

Question 1

What is a homologous pair?

Answer 1

the same gene is on the same loci of the chromosome. different alleles.

Question 2

What is an autosome?

Answer 2

a non sex chromosome

Question 3

monohybrid phenotypic ratio

Answer 3

3:1

Question 4

dihybrid phenotypic ratio

Answer 4

9:3:3:1

Question 5

autosomal linkage

Answer 5

genes on the same autosome are linked.
stay together during independent assortment.
inherited together.
this affects the expected phenotypic ratio.
therefore more offspring will have the same genotype and phenotype as their parents.

Question 6

What can disrupt autosomal linkage?

Answer 6

separation during crossing over.
this leads to majority having the same as the parent but some will be different.

Question 7

When the loci of the genes is closer what happens?

Answer 7

the genes are more closely linked

Question 8

What were Mendel’s 3 laws?

Answer 8

law of segregation.
law of independent assortment.
principle of dominance.

Question 9

What did Hardy-Weinberg say had to happen for the frequency of alleles in a population to remain the same?

Answer 9

no mutations occur.
natural selection does not occur.
population is not isolated.
population is large.
no migration occurs
mating is random

Question 10

What is epistasis?

Answer 10

where one gene modifies or masks the expression of another in a phenotype.

Question 11

What is codominance?

Answer 11

where both alleles for the same characteristic are simultaneously expressed in the heterozygote

Question 12

What is sex linked?

Answer 12

genes located on a sex chromosome

Question 13

Hardy Weinberg equation

Answer 13

P² + 2pq + q² = 1

Question 14

What does p stand for?

Answer 14

The frequency of the dominant allele

Question 15

What does the q stand for?

Answer 15

The frequency of the recessive allele