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WorksheetsGenes, Genotypes and Alleles
Total questions: 25
Worksheet time: 13mins
Which of the following best defines a gene?
A specific version of a gene
A collection of alleles
The entire set of genes in an organism
A segment of DNA that encodes a specific trait or function
What is an allele?
The entire genetic makeup of an organism
A gene that determines the physical appearance of an organism
An alternative form of a gene
The complete set of chromosomes in an organism
What does the term "genome" refer to?
A) A specific region of a chromosome
B) The complete set of genes in an organism
C) The number of alleles present in an individual
D) The physical appearance of an organism
How do genes and alleles relate to each other?
A) Genes are alternative forms of alleles
B) Genes are collections of alleles
C) Alleles are segments of genes
D) Genes and alleles are unrelated terms
Which statement is true regarding the size and number of chromosomes in different organisms?
A) All organisms have the same number of chromosomes
B) The size and number of chromosomes vary greatly among different organisms
C) Organisms with larger chromosomes have fewer in number
D) The size of chromosomes is consistent, but the number varies
Which of the following organisms typically has the largest number of chromosomes?
Humans
Fruit flies
dogs
mice
Which term refers to the ordered display of an organism's chromosomes?
Allele
Genotype
Karyotype
Phenotype
What is the approximate number of chromosomes in a human somatic cell?
23
46
69
23.456
What is the primary function of chromosomes in an organism?
A) Carrying genetic information
B) Determining physical characteristics
C) Controlling gene expression
D) Regulating cell division
Which nucleotide pairs with Guanine in DNA?
Adenine
Thymine
Cytosine
Uracil
In RNA, what does Adenine pair with?
Guanine
Thymine
Cytosine
Uracil
In DNA, which nucleotide always pairs with Cytosine?
Adenine
Thymine
Guanine
Cytosine
In the diagram, the letter 'A' represents
The pentagon
phosphate group
nitrogenous base
sugar
In the diagram, the letter 'B' represents
The pentagon
phosphate group
nitrogenous base
sugar
In the diagram, the letter 'C' represents
The pentagon
phosphate group
nitrogenous base
sugar
This diagram represents
A nucleotide
A gene
An allele
A complex monosaccharide
The name for this structure is
Double Helix
Triple Helix
The Gene Ladder
Twirly Ladder
The green, dark blue, orange and grey parts on this diagram represent
Nucleotides
Nitrogenous base
Sugar
Genes
If green is dominant over purple, then what is the genotype for this individual?
purple
GG
gg
green
Which of the following genotypes is heterozygous?
Bb
BB
bb
B
Which of the following is correctly matches: ATT GTA CGA
TAA CAT GCT
ATT GTA CGA
TAA GTA TCG
GCC ACG TAC
Which of the following is NOT a key difference between DNA and RNA?
DNA double stranded - RNA single stranded
DNA deoxyribose - RNA ribose
DNA always stays in the nucleus - RNA doesn't
DNA has uracil - RNA has thymine
