Hargrave HS Biology EOC Review - 6H Quiz

In gel electrophoresis a DNA sample from an unknown donor is placed in a small well at one end of a special gel-coated plate. Samples from known donors are placed in other wells on the plate. An electric current is passed through the plate, causing the DNA fragments to separate. The size and location of the separated fragments can be compared for similarities. The more similar the locations and sizes of the fragments, the more closely the donors of the samples are related. The diagram shows four samples being compared with an unknown sample.

The donor of which sample is most closely related to the donor of the unknown sample?

• Sample 1

• Sample 2

• Sample 3

• Sample 4

The results shown in the picture were obtained using a technique known as gel electrophoresis. This technique separates mixtures of DNA. In the picture nine different samples of DNA are compared.

Gel electrophoresis can be used to —

• determine the differences in ages of a set of people

• identify how closely two individuals are related

• determine how effective certain medications are

• D identify different blood types

How many pairs of chromosomes are in a human being?

• 23

• 44

• 89

• 72

If we were to look inside a normal male bone cell, how many total chromosomes would we find?

• 1

• 2

• 23

• 46

When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs.

• crossing over

• mutagenesis

• hybridization

• fertilization

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Human eggs and sperm are _____, and each has ____ chromosomes.

• diploid, 23
• diploid, 46
• haploid, 23
• haploid, 46

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Based on the Karyotype shown, at which chromosome pair can we identify a genetic disorder? 

• Chromosome pair 5
• sex chromosomes
• Chromosome pair 21
• There are no chromosomal disorders

A nondisjunction resulting in three chromosomes in one position is called

• monosomy
• disomy
• trisomy
• polysomy

If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?

• sex-linked trait
• polygenic trait
• codominant trait
• incomplete dominance trait

Tags

NGSS.HS-LS3-1

The two sister chromatids are attached to each other at a point called the __________ of a chromosome.

• zygote

• autosome

• gene

• centromere

Tags

NGSS.HS-LS1-4