Unit 1 - Topic 4

Question 1

Genetics

Answer 1

Study of genes or heritable traits (heredity)

Question 2

Continuous variation

Answer 2

In genetics, traits that show a range of possibilities

Question 3

Discrete variation

Answer 3

In genetics, inherited traits that gave a limited number of variations

Question 4

Examples of continuous variation

Answer 4

Height
Weight
Hair colour
Skin colour
Eye colour
Hand span

Question 5

Discrete variation examples

Answer 5

Tongue rolling
Thumb type
Blood type
Middigital hair
Earlobe
Hairline
Sex

Question 6

Dominant trait

Answer 6

An inherited trait that shows up in the offspring

Question 7

Recessive trait

Answer 7

An inherited trait that shows up in the offspring only if both parents passed on the genes for the trait

Question 8

Dominant vs recessive

Answer 8

When mixed with genes for a dominant trait, a recessive trait doesn’t show up in the offspring

Question 9

Frequency vs dominant

Answer 9

Not to be mixed up
Frequency differs from pop to pop
In some pops majority has recessive trait

Question 10

Mutations

Answer 10

Changes in genetic information (DNA) of an organism

Question 11

Mutagen

Answer 11

An agent that can cause mutations (changes in genetic info of an organism)

Question 12

Nature vs nurture

Answer 12

Interactions between a person’s genetics and environment are complex and not well understood

Question 13

Nurture eg

Answer 13

Scars and injuries 
Diet
Activity level
Hairstyle 
Clothing 
Etc

Question 14

Blood types

Answer 14

A
B
AB
O

Question 15

Knowledge of genetics focused on … variation + why

Answer 15

Discrete

Easier to understand and test

Question 16

Brown vs blue

Answer 16

Brown is dominant

Blue is recessive

Question 17

Asparagus

Answer 17

Bad smelling excretion

Dominant trait being able to smell smell

Question 18

Kermode Bear of Bc

Answer 18

Rare type of black bear
Has white fur
Recessive trait

Question 19

Music notes

Answer 19

Some ppl cringe while others don’t
Inherited
Cuz studies shown that identical twins able to recognize mistakes in tunes
Musical experience is factor

Question 20

Body size

Answer 20

Not always genetics

Woman who smoke during pregnancy tend to have smaller babies with potential for more health problems

Question 21

What can mutations cause

Answer 21

Changes in structure of organisms

Question 22

Mutagen examples

Answer 22

X rays
UV rays
Cosmic rays
Some chemicals

Question 23

Mutations extent

Answer 23

Dependent
Some have little to no effect
Often can disrupt complex interactions of chemicals and cells nec for life

Question 24

Cancer cause

Answer 24

Mutations in individual cells

Question 25

Cancerous cells facts

Answer 25

Go through rapid cell division Don’t develop same way healthy cells develop Can interfere w/ nearby cells Prevents body from performing normally

Question 26

Mutations in DNA of reproductive cells (sperm or eggs)

Answer 26

Changes may be passed on to offspring Increase variation I think species Result in unfavourable variations usually Occasionally new variations harmful or even beneficial

Question 27

Sickled red blood cells

Answer 27

Deformed Recessive trait Ppl with trait very ill When mixed with dominant normal-cell trait it’s beneficial Ppl with mutation less likely to catch malaria