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WorksheetsChromosomes
Total questions: 33
Worksheet time: 20mins
A _________ is DNA tightly coiled around proteins.
gene
chromosome
trait
mutation
The number of human chromosomes is
23
46
92
64
What are found within chromosomes?
Karyotype
nucleus
genes
traits
Where are chromosomes found in a cell?
in the mitochondria
in the cell membrane
in the cytoplasm
in the nucleus
Homologous Chromosomes are a combination of how many chromosomes from each parent?
1 from each parent
2 from each parent
1/2 from each parent
23 from each parent
What is an organized picture of all of an organism’s homologous chromosome pairs lined up with each other?
DNA
A Chromosome
Karyotype
Allele
Which set of chromosomes represents a male?
XX
XY
XXY
XYY
How many pairs of chromosomes does everyone have?
46
16
8
23
The picture shows 46 chromosomes taken from a human:
Male, because there are two X chromosomes
Male because there is an X and a Y
Female because there are two X chromosomes
Female because there is an X and a Y
What is a long coiled strand of DNA and proteins?
gene
RNA
chromosome
genome
Which of the following statements about chromosomes is correct?
Chromosomes are long, thread-like structures
Chromosomes are found in the nucleus of all cells in the human body
Chromosomes contain DNA
All of the above
What are homologous chromosomes?
gene pair where each allele in the pair is the same version
the physical expression of a set of genes for a particular trait
chromosome pairs (one from each parent) that are similar size and carry genes for the same trait
Chromosomes can always be seen in a cell
True
False
The disc shaped protein core that DNA wraps around is called
histone
nucleosome
chromatin
gene
What do each of the colored bands on the chromosome diagram represent?
DNA
Cells
Genes
What does haploid mean?
A cell with two sets of chromosomes
A cell with four sets of chromosomes
A cell with one set of chromosomes
A cell with three sets of chromosomes
What does diploid mean?
A cell with three sets of chromosomes
A cell with two sets of chromosomes
A cell with four sets of chromosomes
A cell with one set of chromosomes
What is the haploid number in humans?
92
46
23
69
What is the diploid number in humans?
23
69
92
46
What are homologous chromosomes?
Chromosomes that are different in shape and size
Chromosomes that have different types of genes
Chromosomes that are similar in shape and size and have the same types of genes in the same locations
Chromosomes that are not present in somatic cells
Which cells in the body are referred to as somatic cells?
Gametes
Skin cells
Muscle cells
The part of the cell that contains chromosomes and genes is the:
Mitochondria
Nucleus
Chloroplast
Ribosomes
2. How many autosomes are in this human karyotype? How many sex chromosomes?
22 pairs of autosomes, 1 pair of sex chromosomes
46 pairs of autosomes, 1 pair of sex chromosomes
23 pairs of autosomes, 23 pairs of sex chromosomes
20 pairs of autosomes, 3 pairs of sex chromosomes
3. Is this organism male or female?
Male because the sex chromosomes are the same XX
Female because the sex chromosomes are the same XX
Male because the sex chromosomes are different XY
Female because the sex chromosomes are different XY
