Determination of Sex + Variation Flashcards

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1
Q

What pair chromosome does sex depend on

A

pair number 23

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2
Q

What is definition for female using chromosome 23

A

Possession of only x chromosome signifies person is female

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3
Q

What is the definition for male using chromosome 23

A

Possession of X and Y chromosomes signifies person is male

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4
Q

What is variation defined

A

Differences in characteristics of individuals within a population

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5
Q

What two things can cause variation

A

inherited alleles (genetic causes)
Environmental causes

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6
Q

What can genetic variation sometimes be caused bu

A

Random mutation

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7
Q

What usually happens with mutation

A

most have no effect on phenotype

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8
Q

What happens if a mutation causes a new phenotype that is suited to the environment the individual is in

A

relatively rapid change in the species

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