lecture 18 - intro to mendelian genetics

Question 1

What is a locus?

Answer 1

A particular position on a chromosomes, where the genes for a particular trait reside.

Question 2

What does a test cross determine?

Answer 2

Whether an individual displaying a dominant trait is homozygous dominant or heterozygous.

Question 3

What is the individual of interest crossed with in order to determine genotype in a test cross?

Answer 3

Homozygous recessive individual.

Question 4

What are Mendel’s two laws?

Answer 4

Law of segregation, Law of independent assortment.

Question 5

What does Mendel’s Law of Segregation state?

Answer 5

Genes segregate at meiosis so that each gamete contains 1 gene from 1 parent

Question 6

What does Mendel’s Law of Independent Assortment state?

Answer 6

That genes assort independently during gamete formation.

Question 7

What is a mono hybrid cross?

Answer 7

A cross between 2 individuals differing in a single trait.

Question 8

What are progeny?

Answer 8

Offspring/descendants

Question 9

What genotype is the “true breeding variety”?

Answer 9

Homozygous

Question 10

If an individual is a “dihybrid” is it heterozygous or homozygous?

Answer 10

Heterozygous