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WorksheetsGenetics Review
Total questions: 44
Worksheet time: 27mins
What is the term used to describe the physical characteristics of an organism?
Genotype
Phenotype
Allele
Chromosome
In pea plants tall stems are dominant (T) to short stems (t). If we cross two heterozygous pea plants (Tt), what is the probability of obtaining a pea plant with tall stems (dominant trait)?
25%
50%
75%
100%
Which tool would you use to predict the genotype and phenotype ratios of offspring from genetic crosses?
Genetic map
Punnett Square
DNA sequencer
Microscope
If a trait is recessive, what must be true for it to be expressed in the phenotype of an organism?
The organism needs one copy of the recessive allele.
The organism needs two copies of the dominant allele.
The organism needs two copies of the recessive allele.
The organism can have any combination of alleles.
What does the term "genotype" refer to?
The physical appearance of an organism.
The set of genes in our DNA which is responsible for a particular trait.
The variations in physical appearance among similar organisms.
The study of genes and their functions.
Who was the scientist that established the laws of genetic inheritance?
Gregor Mendel
Sidney Altman
Francis Crick
Albert Einstein
In a Punnett square, what does a capital letter represent?
A recessive trait
A dominant trait
A phenotype
A genotype
What is the expected phenotype ratio of a cross between two heterozygous (Bb) organisms for a trait where 'B' is dominant and 'b' is recessive?
3:1
1:2:1
9:3:3:1
1:1
What is the expected genotype ratio of a cross between two heterozygous (Bb) organisms for a trait where 'B' is dominant and 'b' is recessive?
3:1
1:2:1
9:3:3:1
1:1
What is an example of a phenotype?
Blood type
DNA sequence
Chromosome number
Gene location
Which of the following is true about dominant alleles?
They are always more common in the population.
They hide the effect of recessive alleles when present.
They can only be inherited from one parent.
They are always beneficial to the organism.
What is a homozygous genotype?
Having two different alleles for a trait
Having two identical alleles for a trait
Having no alleles for a trait
Having multiple alleles for a trait
What is the genotype of an organism that is heterozygous for a trait?
AA
aa
Aa
AAA
What does a Punnett square show?
The actual results of a genetic cross
The potential genotypes of the offspring from a genetic cross
The physical characteristics of the parents
The DNA sequence of the offspring
What does an organism's genotype determine?
Its habitat
Its migration patterns
Its phenotype
Its diet
What is the genotype of the mama dragon?
(E= 3 eyes, e= 1 eye)
_______ is what you see, or the physical appearance.
If the 2 alleles of a trait are different, the individual is ______.
Homozygous
Heterozygous
If the 2 alleles of a trait are the same, the individual is ______.
Homozygous
Heterozygous
What is the main difference between genotype and phenotype?
Genotype refers to the physical appearance, while phenotype refers to the genetic makeup
Genotype and phenotype are the same thing
Genotype refers to the genetic makeup, while phenotype refers to the physical appearance
There is no difference; both terms are used interchangeably
Identify the following as either a genotype or a phenotype:
Widow's Peak
Genotype
Phenotype
Identify the following as either a genotype or a phenotype:
Gg
Genotype
Phenotype
"The Great White Shark was 20 feet in length." Phenotype or Genotype?
In the punnett square below, what belongs in the missing square
Look at the Punnett Square, and answer the question.
If the cross resulted in 4 offsprings, how many tongue-rollers can you predict would result?
What is the missing parent's genotype?
DD
Dd
dd
Who wins the bet?
What is an allele?
A type of gene
A variant form of a gene
A type of chromosome
A mutation in a gene
How are alleles inherited?
From the mother only
From the father only
From both parents
Randomly from the environment
A segment of DNA that codes for a trait
gene
allele
chromosome
chromatid
What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn if pink is dominant and purple is recessive?
Who is known as the father of genetics?
Albert Einstein
Marie Curie
Charles Darwin
Gregor Mendel
