Mendel's Concept of Inheritance

Question 1

pure breed

Answer 1

A population that is inbred enough that offspring are always very 
similar to their parents

Question 2

Hybrid

Answer 2

when you cross two pure breeds

Question 3

Mendel and the Pea

Answer 3

He bred two pure breeds and found that all had one trait. f2 generation had a bit of another trait but still mostly one trait. F2 generation had a 3:1 ratio of traits.

Question 4

When two pure breeds cross, it is a

Answer 4

100 percent dominant but heterozygous. when you breed again, this has F2 generation of 3:1 ratio

Question 5

Mendel’s interpretation

Answer 5

he said that each parent had 2 factors for yellow and 2 for green. each factor is distributed to offspring from each parent RANDOMLY. offspring are hybrid but yellow is dominant so all have yellow

Question 6

Principle of segregation

Answer 6

In adults genes exist in pairs, which 
segregate randomly when gametes are formed and then 
recombine into pairs at fertilization. In other words, a sperm or 
egg (haploid) has only one copy of each gene, while a (diploid) 
adult has two copies.

Question 7

Principle of Dominance

Answer 7

If an individual is heterozygous (has 
two different versions of the same gene), then one version will dominate and the other will disappear (recede in Mendel’s terms). The recessive version of the gene will only show up as a trait 
when an individual inherits two copies of the recessive, or is 
homozygous recessive.

Question 8

Genotype:

Answer 8

combination of alleles (YY, Yy or yy)

Question 9

phenotype

Answer 9

trait (blue or green eyes)

Question 10

heterozygous genotype

Answer 10

Hybrid. Two different alleles.

Question 11

“factors”

Answer 11

genes

Question 12

monohybrid cross

Answer 12

mating between hybrids for one gene using (Yy, Yy)