AnswersLHS Biology 1Unit Test

Chromosomes Answers

0 verified answers1 views
1
Free Preview

Pedigrees and karyotypes provide the means for individuals to identify their risks of genetic disorders. What can be observed on a karyotype but not on a pedigree?

A
family carriers of a genetic disorder
B
family history of a genetic disorder
C
risk of a genetic disorder in offspring
D
a visual image of a chromosomal defect
2
Free Preview

Which flowchart correctly lists the structures in order from smallest to largest?

A
gene DNA chromosome nucleus
Option A
B
gene chromosome DNA nucleus
Option B
C
DNA gene chromosome nucleus
Option C
D
DNA chromosome gene nucleus
Option D
3

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
4

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
5

Having the ability to roll or curl the tongue up along both sides to form a tube is a dominant trait. Which diagram represents the chromosomes in a person that does not have this ability?

A
2 chromosomes are labeled Upper H and Upper H.
Option A
B
2 chromosomes are labeled Upper H and h.
Option B
C
2 chromosomes are labeled h and h.
Option C
D
1 chromosome is labeled Upper H and the other chromosome is not labeled.
Option D
6

Which statement about sister chromatids is true?

A
One sister chromatid is inherited from each parent.
B
Sister chromatids are always in every cell.
C
Sister chromatids are only present during cell reproduction.
D
Each sister chromatid forms a lobe of a chromosome.
7

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
8

How can the two chromosomes that make up a homologous pair differ?

A
They can contain different alleles for the same trait.
B
They can contain genes that code for different traits.
C
They can contain the same genes in different orders.
D
They can contain a different number of genes.
9

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
10

While analyzing a karyotype, geneticists identify a missing chromosome. Which term describes this chromosomal abnormality?

A
aneuploidy
B
polyploidy
C
triploidy
D
tetraploidy

Did you find these answers helpful?

More from this Course

Quiz
15 verified answers

Unit Test

Quiz
10 verified answers

DNA Mutations

Quiz
9 verified answers

DNA Mutations