lecture 7

Question 1

what is a reciprocal cross?

Answer 1

cross between a male of one stain and a female of another and vice versa

Question 2

what is a self cross?

Answer 2

taking organisms from the F1 generation and crossing them with themselves

Question 3

what theory did the pea plant experiments disprove?

Answer 3

blended inheritance- the F1 generation were all-round, not a mix of round/wrinkled

Question 4

what is the ratio of appearance of the recessive trait in the F2 generation?

Answer 4

3 dominant : 1 recessive, even though it wasn’t present at all in F1

Question 5

what is the discrete particle of inheritance called?

Answer 5

gene

Question 6

what are alternative forms of a gene called?

Answer 6

alleles

Question 7

what is the physical location of any gene on a chromosome called?

Answer 7

locus

Question 8

what is the combination of alleles an individual has called?

Answer 8

genotypes

Question 9

what is the physical appearance of a trait called?

Answer 9

phenotype

Question 10

what is an individual having the same alleles(RR or rr) called?

Answer 10

homozygote

Question 11

what is an individual having different alleles(Rr) called?

Answer 11

heterozygote

Question 12

what is Mendel’s third law?

Answer 12

the idea of dominance; the trait from one allele will mask the trait of another

Question 13

what is a monohybrid cross?

Answer 13

mating between two individuals with alleles at a single locus

Question 14

what is Mendel’s first law?

Answer 14

the segregation of alleles; every individual has two alleles for a trait(diploid)
during the formation of gametes, the alleles separate and the offspring randomly receive one allele from each parent