Ch. 6.1-6.2 Mendel, Monohybrid Cross

Question 1

What is heredity in Mendel theory?

Answer 1

Tranfer of traits from parents to offspring

Question 2

What is heretable feature called in Mendel theory?

Answer 2

Trait or phenotype

Question 3

What is genotype in Mendel theory?

Answer 3

Alleles that humans have as they have 23 homologous pairs

Question 4

What did Mendel study about pea plants phenotypes

Answer 4

That he discover pea plant phenotypes are such as purple flower or white flower, yellow seeds or green seeds, wrinkled seeds or round seeds, and tall or short plants

Question 5

What is homozygous in Mendel theory?

Answer 5

True breeding, the alleles for some traits are same

Question 6

What is heterozygous in Mendel theory?

Answer 6

Alleles for a trait are different

Question 7

What is dominant trait in Mendel theory?

Answer 7

Trait expressed in f1 generation

Question 8

What is recessive trait in Mendel theory?

Answer 8

Trait not expressed in f1 generation

Question 9

What is the consistent proportion that Mendel found in f2 generation table?

Answer 9

The proportion was very close to 3:1 (dominant:recessive)

Question 10

What did mendel found regarding phenotype and genotype ratio?

Answer 10

Phenotype was 3:1 (dominant:recessive, purple:white)
Genotype was 1:2:1 (homozygous dominant : heterozygous : homozygous recessive)

Question 11

What is punnett squares?

Answer 11

List of possible gametes one individual on side of squares and other individual on the other side of squares

Question 12

If two pea plants are heterozygous for flower colour
1. What colour would they be?

Answer 12

Purple (since one of them is dominant)

Question 13

If two pea plants are heterozygous for flower colour
2. what are the possible gametes they could form?

Answer 13

P or p

Question 14

If two pea plants are heterozygous for flower colour
3. what are the possible offspring they could produce?

Answer 14

PP, Pp, pp

Question 15

If two pea plants are heterozygous for flower colour
4.what is the probability that those pea plants would have
offspring with white flowers?

Answer 15

25% (PP, pP, pP, pp)

Question 16

What is Testcross that Mendel devised?

Answer 16

Testcross is to determine the genotype of unknown individuals in f2 generation; If offspring express the dominant, the unknown is homozygous, and if offspring expess the recessive, the unknown is heterozygous