17-1 Genes And Variation Flashcards

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0
Q

A(n) ________ consists of all the genes, including the alleles for each gene, that are present in a population.

A

Gene pool

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1
Q

Natural selection works on an organism’s __________ rather than it’s __________.

A
  1. Phenotype

2. Genotype

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2
Q

A gene pool typically contains different __________ for each heritable trait.

A

Alleles

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3
Q

The number of times that an allele occurs in a gene pool compared with the number of times the other alleles for the same gene occur is called the ____________ of the population.

A

Allele frequency

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4
Q

A genetic material change of a cell is a ___________.

A

Mutation

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5
Q

How do mutations effect evolution?

A

Only when it effects the reproducing

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6
Q

2 ways genes can recombine during meiosis

A
  1. Independent assortment of chromosomes

2. Gene swapping

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7
Q

___________ happens when genes are passed to organism that aren’t offspring.

A

Lateral gene transfer

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8
Q

The number of __________ produced for a given trait depends on how many genes control the trait.

A

Phenotypes

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9
Q

Height in humans is an example of a ___________ trait.

A

Polygenic

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10
Q

Each gene of a polygenic trait often has two of more ___________.

A

Alleles

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11
Q

A single polygenic trait had many possible ____________.

A

Genotypes

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12
Q

A symmetrical bell-shaped graph is typical of ____________ traits.

A

Polygenic

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13
Q

Single genes are…

A
  1. Controlled by 1 gene

2. Only 2/3 distinct Phenotypes

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14
Q

Polygenic traits are…

A
  1. Controlled by 2 or more genes

2. May have many Phenotypes that aren’t clearly distinct

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