17-1 Genes And Variation

Question 0

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

Answer 0

Gene pool

Question 1

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

Answer 1

1. Phenotype

2. Genotype

Question 2

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

Answer 2

Alleles

Question 3

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.

Answer 3

Allele frequency

Question 4

A genetic material change of a cell is a ___________.

Answer 4

Mutation

Question 5

How do mutations effect evolution?

Answer 5

Only when it effects the reproducing

Question 6

2 ways genes can recombine during meiosis

Answer 6

1. Independent assortment of chromosomes

2. Gene swapping

Question 7

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

Answer 7

Lateral gene transfer

Question 8

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

Answer 8

Phenotypes

Question 9

Height in humans is an example of a ___________ trait.

Answer 9

Polygenic

Question 10

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

Answer 10

Alleles

Question 11

A single polygenic trait had many possible ____________.

Answer 11

Genotypes

Question 12

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

Answer 12

Polygenic

Question 13

Single genes are…

Answer 13

1. Controlled by 1 gene

2. Only 2/3 distinct Phenotypes

Question 14

Polygenic traits are…

Answer 14

1. Controlled by 2 or more genes

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