CH10 types of variation

Question 1

Variation

Answer 1

• the differences in characteristics between organisms

Question 2

Interspecific variation

Answer 2

• type of variation between members of different species

Question 3

Intraspecific variation

Answer 3

• type of variation between organisms of the same species

Question 4

Causes of variation

Answer 4

• an organisms genetic material
• the environment in which an organism lives

Question 5

Alleles - variation

Answer 5

• Genes have different alleles, and with a gene for a particular characteristic, alleles produce different effects
• Individuals in a species may inherit different alleles of a gene

Question 6

Mutations - variation

Answer 6

• changes to the dna sequence and genes can lead to changes in the proteins coded for
• These protein changes can affect physical and metabolic characteristics
• If a mutation occurs in gamete’s it may be passed on to the organisms offspring

Question 7

meiosis - variation

Answer 7

• independent assortment and crossing over

Question 8

Sexual reproduction - variation

Answer 8

• offspring produced from two individuals inherits genes from each of the parents

Question 9

Chance - variation

Answer 9

• many different gametes are produced from the parental genome
• During sexual reproduction, it is down to chance which two combine

Question 10

Examples of characteristics caused by environment variation

Answer 10

• scars