S2 BIO TEST 3 CH15: Mutations, Pedigree, Karyotypes

A karyotype is assembled from the cell of a human donor who has a genetic disorder. Which disorder can be determined by studying the karyotype?

• A chromosomal disorder, such as Downs Syndrome

• An autosomal dominant disorder such as Huntington’s Disease

• A genetic disorder caused by a point mutation, such as sickle cell

• An X- Linked genetic disorder, such as colorblindness

A photograph of all of the chromosomes arranged in pairs is called a _____.

• karyotype

• pedigree

• punnett square

• venn diagram

A human karyotype has _____.

• 23 pairs of autosomes and 2 pairs of sex chromosomes

• 22 pairs of autosomes and 1 pair of sex chromosomes

• 23 pairs of sex chromosomes and 2 pairs of autosomes

• 22 pairs of sex chromosomes and 1 pair of autosomes

A _____ shows family relationships and the presence or absence of a trait in each member.

• karyotype

• pedigree

• genome

• punnett square

The diagram shows 4 pairs of chromosomes from a human male. Which pair of chromosomes is the sex chromosomes?

• Pair 1

• Pair 2

• Pair 3

• Pair 4

Sophie is studying the karyotype of an unknown human donor. She observes that in each of the chromosome pairs, the two chromosomes have the same size and shape. What can Sophie conclude from these observations?

• The donor is female

• The donor is male

• The donor will express only the dominant forms of traits.

• The donor will express only the recessive forms of traits.

Tags

NGSS.HS-LS3-1

A genetic disorder is caused by a sex- linked allele on the Y chromosome. How is this disorder inherited?

• from father to son

• from mother to son

• from father to son or daughter

• from mother to son or daughter

What is the probability of a couple having a son who is colorblind if the mother is a carrier (X^CX^c) and the father has normal vision (X^cY)? Colorblindness is a recessive trait.

HINT: Do a Punnett Square

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Which gender can carry colorblindness if it is an X- linked trait?

• females

• males

• both

• neither

In a pedigree, squares represent _____, and circles represent _____.

• males; females

• males; males

• females; females

• females; males