Chapter 3

Question 1

What is the significance of the pea plant (Pisum sativum) Gregor Mendel studied?

Answer 1

• bisexual and self-pollinating
• inbreeding, no heterozygosity
• true-breeding

Question 2

What is an artifical cross?

Answer 2

an allele cross with the first generation’s alleles

Question 3

What did Mendel’s pea plant results prove, and how?

Answer 3

• Proved the critical ideas of blending and inheritance of acquired characteristics wrong
• Blending
  
  • offspring had genotypes similar to their parents
• inheritance of acquired characteristics
  
  • offspring also had a mixture of the parent’s genotypes

Question 4

What ratio did mendel contain from his monohybrid and dihybrid cross?

Answer 4

monohybrid
- 1:2:1

dihybrid
- 9:3:3:1

Question 5

What is the Law of Segregation?

Answer 5

when an organism creast gametes, each gamete receives one gene copy

Question 6

How does the Law of Segregation relate to meiosis?

Answer 6

• chromosomes act like genes
• pair up then segragate from eachother

Question 7

What is a backcross?
test cross?

Answer 7

backcross
- cross a gene pair with the previous generation’s gene pair

test cross
- cross a gene pair with a pure recessive gene pair

Question 8

What does H0 mean?
HA?

Answer 8

H0
- null hypothesis

HA
- alternate hypothesis