Lecture 29

Question 1

What are alleles? What does Allelic variation explain?

Answer 1

alternate versions of the same gene…why the same trait can vary from 1 person to another

Question 2

What does the Law of Segregation state?

Answer 2

that a trait’s 2 alleles must separate during gamete formation, they end up in different gametes

Question 3

What happens when someone’s gene for a certain allele is truncated?

Answer 3

Mutated allele does not encode for the enzyme that the gene should encode for, so it appears to lack whatever that was

Question 4

What is a monohybrid?

Answer 4

heterozygous for a single characteristic

Question 5

What does the Law of Indep. assortment state?

Answer 5

that segregation (of each pair of alleles splitting up into single alleles and going to different gametes) occurs unrelated to any other pairs of alleles

Question 6

How did they prove the idea of independent assortment?

Answer 6

dihybrid cross of homozygous dominate and recessive, then crossed the monohybrid F1 and counted F2 phenotypes. 9:3:3:1