Intro to Inheritance

Question 1

What plants did Mendel use in his experiment and why?

Answer 1

• He used pea plants
• They were widely available, reproduce fairly quickly, and have distinct measurable characteristics

Question 2

Pure Breeding Plants
(true breeding plants)

Answer 2

Offspring produced by many generations of self-pollination

Question 3

Hybrids

Answer 3

The offspring produced by two different pure breed plants

Question 4

P1 (parental generation)

Answer 4

The parents used in a “cross” (mating)

Question 5

F1

Answer 5

The offspring of the P1 generation

Question 6

F2

Answer 6

The offspring of two F1 being crossed together

Question 7

Law of Segregation

Answer 7

• During inheritance, pairs of “factors separate or “segregate” at the gamete stage
• Now we call these factors “Alleles” and two alleles together are expressed as one trait
• 2 alleles=1 genotype

Question 8

Dihybrid Cross

Answer 8

A cross between two individuals who are heterozygous for 2 traits

Question 9

Law of Independent Assortment

Answer 9

• The inheritance of alleles for one trait does NOT affect the inheritance of alleles for another trait
• We now know there are some exceptions to this