Variation, Genetics + Inheritance (paper 2) Flashcards

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1
Q

Differences in the characteristics of individuals in a population is called
variation and may be due to differences in:

A
  • the genes they have inherited (genetic causes)
  • the conditions in which they have developed (environmental causes)
  • a combination of genes and the environment.
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2
Q

usually what is the range of variation within a species

A

there is usually extensive genetic variation within a population of a species

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3
Q

what do all variants arise from

A

mutations

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4
Q

do mutation have an effect on its phenotype

A

most have No effect and some *influence** phenotypes , very few determine phenotype

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5
Q

what is the phenotype

A

the physical characteristic of an organism which occurs as a result of its genes

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6
Q

What are mutations, and how often do they occur?

A

Mutations occur continuously

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7
Q

How and how often can a mutation lead to the evolution of a species in response to environmental changes?

A
  • Very rarely a mutation will lead to a new
    phenotype
  • If the new phenotype is suited to an environmental change it
    can lead to a relatively rapid change in the species
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8
Q

species definition

A
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