10.5 Types Of Variation

Question 1

Define variation

Answer 1

The differences in characteristics between organisms

Question 2

What is inter specific variation

Answer 2

The differences between organisms of difference species

Question 3

What is intraspecific variation

Answer 3

The differences between organisms of the same species

Question 4

What two factors cause variation

Answer 4

• organisms genetic material
  Differences in genetic material an organism inherits from it parents leads to genetic variation
• environment in which organisms live
  Causes environmental variation

Question 5

Genetic variation is due to what and what causes genetic variation to be present

Answer 5

Due to the genes and alleles and individual posses
1. Alleles
2. Mutations
3. Meiosis
4. Sexual reproduction
5. Chance

Question 6

How are alleles a cause for genetic variation being present within a population

Answer 6

Genes have different alleles.
With a gene for a particular characteristic different alleles produce different effects
Individuals in a species population may inherit different alleles of a gene

Question 7

How are mutations a cause for genetic variation being present within a population

Answer 7

Changes to the DNA sequence so therefore genes can lead to changes in the proteins that are coded for
Protein changes can affect physical an metabolic characteristics
If mutations occur in somatic cells it can affect individual but if mutations occurs in gametes it can be passed on to the organisms offspring

Question 8

How is meiosis a cause for genetic variation being present within a population

Answer 8

Each gamete produced by meiosis receives half the genetic content of a parent cell
Independent assortment and crossing over happens leading to the gametes of an individual showing variation

Question 9

How is sexual reproduction a cause for genetic variation being present within a population

Answer 9

Offspring produced for two individual inherits genes from each of the parents
Each individual produced therefore differs from parents

Question 10

How is a chance a cause for genetic variation being present within a population

Answer 10

During sexual reproduction it is a result of chance as to which two combine. The individuals produced therefore Also differ from their siblings as each contain a unique combination of genetic material

Question 11

Environmental causes of variation

Answer 11

All organisms affected by environment they live in
Plants are affected to a greater degree then animals due to the plants lack if mobility