Human Genetics

The diagram below represents the karyotype of a person with a genetic disorder.

Which is the likely cause of this condition? (3.2.2)

• nondisjunction during mitosis

• nondisjunction during meiosis

• chromosomal deletion during mitosis

• chromosomal deletion during meiosis

Tags

NGSS.HS-LS3-2

All organisms begin as a single cell. After dividing many times, differentiation occurs. During the process of differentiation, (1.1.3)

• some genes are turned on, others are turned off

• genes are removed from some cells

• DNA is modified to contain different genes

A human egg cell might contain (3.2.1)

• 22 autosomes and an X chromosome

• 22 autosomes and a Y chromosome

• 45 autosomes and an X chromosome

• 45 autosomes and a Y chromosome

Tags

NGSS.HS-LS3-1

Human males are much more likely to have hemophilia than human females. This is the case because: (3.2.2)

• the gene for hemophilia is carried on the Y chromosome

• hemophilia is carried on autosomes

• the gene for hemophilia is sex-linked

• hemophilia is a contagious disease to which males are more susceptible

Tags

NGSS.HS-LS3-1

What type of inheritance is shown in the pedigree below? (3.2.2)

• autosomal dominance

• codominance

• incomplete dominance

• sex-linked recessive

Tags

NGSS.HS-LS3-1

Which of the following statements can be determined from the karyotype below? (3.2.2)

• it is a normal female

• it is a female with Down Syndrome

• it is a normal male

• it is a male with Down Syndrome

Tags

NGSS.HS-LS3-2

What is the name of the human chromosomal disorder that results in an extra chromosome #21? (3.2.1)

• Down syndrome

• Turners

• Jacobs

• Klinefelter's

Achondroplasia is a dominant human disorder that results in dwarfism. If two people that are heterozygous for achondroplasia have a child, what is the probability it will be tall? (3.2.1)

• 0%

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

The best description of the individual I-2 is (3.2.2)

• female, XRXr

• male, XRY

• male XrY

• female XrXr

The type of inheritance pattern demonstrated here is

• x-linked recessive

• autosomal dominant

• x-linked dominant

• co-dominant