Genes and Heredity - Review Quiz

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This review quiz is all about genetics. Feel free to do it as many times as you would like to help you study!

The organelle where genetic information is stored in is the *

1 point

Mitochondria

Cell membrane

Chloroplast

Nucleus

Which statement is true of genes? *

1 point

A gene is a short segment of DNA which encodes a specific trait

A gene is a single molecule of DNA

A gene is packed DNA; the human body has 46 of them

None are true.

How many chromosomes does a human have? *

1 point

22 pairs

23 pairs

46 pairs

How many chromosomes are considered "non-sex" chromosomes (autosomes) *

1 point

22 pairs

23 pairs

46 pairs

Tightly packed DNA is a *

1 point

Gene

Chromosome

Genotype

Phenotype

How much genetic information do you inherit from each parent? *

1 point

All from the mother, none from the father

None from the mother, all from the father

1/2 from the mother, 1/2 from the father

What are alleles *

1 point

DNA packed tightly, forming rod-like shapes

A section of DNA that encodes a trait

The expression of encoded DNA (i.e. hair colour, eye colour, ability to roll tongue)

Alternative forms of a specific gene

Which statement is FALSE? *

1 point

A gene is part of a chromosome

Genes determine hereditary characteristics

Chromosomes are part of genes

Chromosomes determine hereditary characteristics

Which of these statements describes a hereditary characteristic? *

1 point

Tears form in your eyes when your're sad

All your friends have long hair

You have a scar on your knee

You love classical music

If you are heterozygous for a specific trait, then you have *

1 point

One dominant and one recessive alleles

Two dominant alleles

Two recessive alleles

An individual with a XY genotype will have what phenotype? *

1 point

Female reproductive organs

Male reproductive organs

Long hair and ability to roll tongue

An individual with a XX genotype will have what phenotype? *

1 point

Female reproductive organs

Male reproductive organs

Short hair and no tongue rolling abilities

Why does a dominant allele create a higher probability of an offspring affected by a disease? *

1 point

Only one dominant parental allele is needed to produce the trait.

The parents always pass on these alleles

Dominant alleles are more common than recessive alleles

A brown eyed parent (Bb) mates with a blue eyed parent (bb). What percentage of offspring will have blue eyes? *

1 point

25%

50%

75%

100%

A brown eyed person (Bb) mates with another brown person (BB). What percentage of offspring will have blue eyes? *

1 point

25%

50%

75%

100%

A blue eyed person (bb) mates with another blue person (bb). What percentage of offspring will have brown eyes? *

1 point

25%

50%

75%

100%

Why do siblings look alike? *

1 point

They have identical DNA

They inherit genetic information from just their mothers

They inherit genetic information from just their fathers

They inherit half their genetic information from both parents, making it the same source

Which two are examples of genetic variation in humans? *

1 point

A scar on your knee and the sex organs you posses.

Your height and your natural eye colour.

Your natural eye colour and the sex organs you posses.

In teddy bears, brown fur is dominant to white fur. A brown teddy bear can have what genotype? *

1 point

BB and Bb

In teddy bears, brown fur is dominant to white fur. A white teddy bear can have what genotype? *

1 point

BB and Bb

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