Chromosomes Answers

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Anita thinks that she has heterozygous alleles for red hair. If she is correct, which of these diagrams best illustrates Anita’s alleles for red hair?

A
2 chromosomes are labeled Upper R and Upper R.
Option A
B
2 chromosomes are labeled Upper R and r.
Option B
C
One chromosome is labeled Upper R and another is unlabeled.
Option C
D
2 chromosomes are labeled r and r.
Option D
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Karyotypes can be studied to determine an organism’s chromosomal makeup and to detect genetic defects. Turner syndrome occurs when a female has an incomplete set of sex chromosomes. Symptoms of Turner syndrome include swollen hands and feet, short stature, and infertility. Which type of chromosomal mutation is responsible for causing Turner syndrome?

A
polyploidy
B
tetraploidy
C
aneuploidy
D
trisomy
3

Consider the chromosome.Which best describes the function of the part labeled b?

Question illustration
A
carries all the genetic information of the organism
B
provides all of the master instructions of the cell
C
joins sister chromatids
D
codes for a specific trait
4

Which illustration depicts homologous chromosomes?

A
A single chromosome is shown.
Option A
B
2 identical chromosomes are shown.
Option B
C
A single chromosome is shown.
Option C
D
2 identical chromosomes are shown.
Option D
5

In cell biology, what does the word queue describe?

A
the short arm of a chromosome
B
the long arm of a chromosome
C
the center of a chromosome
D
the material of a chromosome
6

Which is defined as a cell structure made of DNA that gives all of the master instructions for the cell?

A
centromere
B
chromosome
C
allele
D
gene
7

Justin is looking at two chromosomes that have identical alleles for a particular trait. What term best describes these chromosomes?

A
heterozygous
B
homozygous
C
petit
D
queue
8

Which term describes the chromosomal abnormality of having extra chromosomes?

A
heterosomy
B
polysomy
C
haploidy
D
diploidy
9

Consider the chromosome.Which is indicated by the letter a?

Question illustration
A
petit arm
B
queue arm
C
centromere
D
gene
10

Which diagram correctly shows how heterozygous alleles are found on homologous chromosomes?

A
A chromosome is labeled Upper A a.
Option A
B
A chromosome is labeled a a.
Option B
C
2 chromosomes are labeled Upper A and a.
Option C
D
2 chromosomes are labeled a and a.
Option D

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