Evolution

Question 1

What is evolutiom

Answer 1

Change in dna over time

Question 2

What causes variation in nature

Answer 2

DNA mutation/ natural selection

Question 3

What happens to organism with favorable traits

Answer 3

Survive and reproduce

Question 4

What happens to organisms with unfavorable traits

Answer 4

Die of

Question 5

Natural selection

Answer 5

Organisms with favorable traits survive and reproduce vice versa

Question 6

Artificial selection

Answer 6

Humans determine the best characteristics and make those survive and reproduce

Question 7

Sexual selection

Answer 7

One sex favors a certain trait in the opposite sex and mate with them which makes that trait more common

Question 8

Homologous structures

Answer 8

similar physical features in organisms that share a common ancestor, but the features serve completely different functions Ex whale bat

Question 9

Fossils

Answer 9

Preserved remains of plants/animals

Question 10

DNA and protein

Answer 10

Similar dna= closely related

Question 11

Embryology

Answer 11

Similarities I’m unborn animals

Question 12

Founder effect

Answer 12

Part of the population becomes separated from original population

Question 12

Common ancestors

Answer 12

Organisms that have evolved from one species to different species

Question 13

Vestigial structures

Answer 13

Once useful body parts that have expired use due to evolution example: whale walking fun

Question 14

Bottleneck effect

Answer 14

Extreme reduction due to humans/ natural disaster

Question 15

In nature why do most organisms have a stable population size

Answer 15

Natural selection, competition, lack of recources

Question 16

Gene flow

Answer 16

Occurs when organisms move into or out of an environment, bringing their dna with them

Question 17

Allele

Answer 17

One from mom one from dad :variation of a gene

Question 17

Population

Answer 17

Organisms of a species living together in one particular place

Question 18

Stabilizing selection

Answer 18

Favors the average traits

Question 19

Directional selection

Answer 19

Favors the extreme traits

Question 20

Diversifying selecfion

Answer 20

Selection toward both ends of the extremes

Question 21

Aa

Answer 21

Heterozygous

Question 22

AA

Answer 22

Homozygous dominant

Question 23

aa

Answer 23

Homozygous recessive

Question 24

In a population of 1300 crocodiles 400 appear short toothed which is a recessive trait What percent is homozygous recessive? What is the frequency of the dominant allele? What percent of the population is heterozygous?

Answer 24

31% 44% 19% 49%

Question 25

In owls 250 out of 700 adults have a dominant phenotype What so the frequency of the recessive allele? What is the frequency of the dominant allele? What percent of owls are heterozygous

Answer 25

.8 .2 .32

Question 26

In the scarlet tiger moth color is determined by two alleles. White is dominant and yellow is recessive. I’m a population 1607 are white 59 are yellow Q2 Q P P2 2pq

Answer 26

.04 .2 .8 .64 .32

Question 27

How many decimals do we round to

Answer 27

2