Variation And Inheritance

Question 1

Term for differences and individuals of a species

Answer 1

Variation

Question 2

Two types of variation

Answer 2

Continuous

Discrete

Question 3

Description of continuous variation

Answer 3

Variation which changes gradually between 2 extremes

Question 4

Examples of continous variation

Answer 4

Height
Weight
Hand span

Question 5

Description for discrete variation

Answer 5

Clear cut variation which can be separated into distinct groups

Question 6

Examples of discrete variation

Answer 6

Eye colour
Hair colour
Tongue rolling
Blood type

Question 7

Type of inheritance controlled by more than 1 gene

Answer 7

Polygenic

Question 8

Examples of polygenic features

Answer 8

Height

Weight

Question 9

Term to describe the physical appearance of an organism resulting from genetic info

Answer 9

Phenotype

Question 10

Phenotypes of eye colour in humans

Answer 10

Blue
Green
Brown
Hazel
Grey

Question 11

Term for combination of genes which gives rise to any phenotype

Answer 11

Genotype

Question 12

Term for first generation in a cross

Answer 12

Parent generation

Question 13

Second generation in a cross

Answer 13

F1

Question 14

Offspring of 1st generation

Answer 14

F2

Question 15

Form of a gene which shows in phenotype even if only present singly

Answer 15

Dominant

Question 16

Form of a gene which shows in phenotype when present as a pair

Answer 16

Recessive

Question 17

Different forms of a gene

Answer 17

Alleles

Question 18

Term for an individual with two of the same alleles

Answer 18

Homozugous

Question 19

Term for individual with 2 different alleles

Answer 19

Heterozygous

Question 20

Reasons why predicted phenotype ratios are not always observed in offspring

Answer 20

Fertilisation is random