8.12B Genetics: How do we know what traits we will get?

Multiple Choice

How many pairs of chromosomes do we have?

• 46

• 23

• 19

• 24

Match

Match the following

• Individual chromosomes

• Pairs of chromosomes

• Individual chromosomes from mom

• Individual chromosomes from dad

46

23

23

23

• 46

• 23

• 23

• 23

Multiple Choice

What is a gene?

• A type of protein

• A section of DNA that controls a trait

• A type of organ in the body

• A type of cell in the body

Multiple Choice

Where are genes found?

• In the nucleus

• On the DNA

• In the blood

Multiple Choice

What is the main function of genes?

• To control the acquired traits and characteristics of an organism

• To control all traits and characteristics of an organism

• To control the inherited traits and characteristics of an organism

Open Ended

What is an allele?

Multiple Choice

How many alleles for each gene do you inherit from your parents?

• 1

• 2

• 3

• 4

Match

Match the following

• Gene

• Allele

• Gene

• Allele

• Gene

hair color

brown

eye color

blue

height

• hair color

• brown

• eye color

• blue

• height

Multiple Choice

What does it mean when an allele is dominant?

• It is weaker than other alleles
  
  
  

• It only shows up if two copies are present

• It always determines the trait if present

• It disappears over time

Multiple Choice

If a person inherits two recessive alleles for a trait (bb), what will happen?

• They will show the dominant trait

• They will show the recessive trait

• They will have both traits equally

• They won’t have any traits

Multiple Choice

Which of the following is true about recessive alleles?

• They always show up, even if only one is present

• They only show up if two copies are present

• They are never inherited

• They are stronger than dominant alleles

Multiple Choice

If a person has one allele for brown eyes (B) and one for blue eyes (b), what color will their eyes most likely be?

• Blue

• Brown

• Green

• Hazel

Multiple Choice

Bb

• Dominant

• Recessive

Multiple Choice

gg

• Dominant

• Recessive

Multiple Choice

BB

• Dominant

• Recessive

Multiple Choice

GG

• Dominant

• Recessive

Multiple Choice

FF

• Dominant

• Recessive

Multiple Choice

Ff

• Dominant

• Recessive

Multiple Choice

Gg

• Dominant

• Recessive

Multiple Choice

ff

• Dominant

• Recessive

Multiple Choice

bb

• Dominant

• Recessive

Multiple Choice

Bb is an example of a phenotype?

• True

• False

Multiple Choice

Blue eyes

• Genotype

• Phenotype

Multiple Choice

BB

• Genotype

• Phenotype

Multiple Choice

Cc

• Genotype

• Phenotype

Multiple Choice

Brown eyes

• Genotype

• Phenotype

Multiple Choice

XX

• Genotype

• Phenotype

Multiple Choice

Tall

• Genotype

• Phenotype

Multiple Choice

Long hair

• Genotype

• Phenotype

Multiple Choice

What percent chance that the offspring has brown eyes?

• 50%

• 100%

• 25%

• 0%

Multiple Choice

If two parents both have the recessive allele for blue eyes (bb), what color will their child's eyes be?

• Brown

• Blue

• Green

• Impossible to know

Draw

Draw me a punnett square for a dad who has brown eyes (Bb) and a mom who has blue eyes (bb).

Multiple Choice

Why do siblings sometimes look different even though they have the same parents?

• They inherit random combinations of alleles from each parent

• They all inherit the exact same alleles

• Only the firstborn inherits alleles

• Alleles do not affect appearance