WorksheetsGenetics
Total questions: 15
Worksheet time: 45mins
What is the difference between dominant and recessive alleles?
Dominant alleles require two copies to express their trait, while recessive alleles express their trait with one copy.
Dominant alleles express their trait even if only one copy is present, while recessive alleles require two copies to express their trait.
Dominant alleles are always more common in a population than recessive alleles.
Recessive alleles can never be expressed in the presence of dominant alleles.
Define 'allele'.
An allele is a variant form of a gene that can result in different traits.
An allele is a type of chromosome that determines the sex of an organism.
An allele is a protein that helps in the synthesis of DNA.
An allele is a structure that carries genetic information in the form of RNA.
What is a trait?
A trait is a characteristic that is inherited and can be either dominant or recessive.
A trait is a temporary feature that changes with the environment.
A trait is a behavior that is learned from experience.
A trait is a physical feature that cannot be inherited.
What is a phenotype?
The genetic makeup of an organism.
The observable physical or biochemical characteristics of an organism, determined by its genotype.
The process by which organisms adapt to their environment.
The evolutionary history of a species.
What is a genotype?
The physical appearance of an organism.
The genetic makeup of an organism, representing the alleles it possesses.
The environment in which an organism lives.
The process of cell division in organisms.
What is the law of independent assortment?
The law of independent assortment states that alleles for different traits are distributed to gametes independently of one another.
The law of independent assortment states that alleles for the same trait are inherited together.
The law of independent assortment states that traits are inherited in a fixed ratio.
The law of independent assortment states that dominant traits always mask recessive traits.
Define 'homozygous'.
Homozygous refers to having two identical alleles for a particular gene.
Homozygous refers to having two different alleles for a particular gene.
Homozygous refers to having one dominant and one recessive allele for a particular gene.
Homozygous refers to the genetic makeup of an organism as a whole.
What does a lowercase letter represent in genetics?
A dominant allele, such as for tall plants.
A recessive allele, such as for short plants.
A gene that is not expressed in the phenotype.
An allele that is always expressed regardless of dominance.
What is a chromosome?
A type of protein found in the cell membrane.
A long strand of DNA that contains many genes and is found in the nucleus of eukaryotic cells.
A small organelle responsible for energy production.
A molecule that carries oxygen in the blood.
What is the phenotype for a genotype of 'Tt'?
Tall
Short
Medium
Dwarf
Define 'heterozygous'.
Heterozygous refers to having two different alleles for a particular gene.
Heterozygous refers to having identical alleles for a particular gene.
Heterozygous refers to the absence of alleles for a particular gene.
Heterozygous refers to having multiple genes affecting a single trait.
What does each box in a Punnett square represent?
Each box represents a possible offspring resulting from the combination of alleles from the parents.
Each box represents the genotype of one parent.
Each box represents the phenotype of the offspring only.
Each box represents a random selection of alleles from the gene pool.
What does capital letter represent for the genotype?
A recessive allele, such as for short plants.
A dominant allele, such as for tall plants.
A neutral allele, which has no effect on the phenotype.
An allele that is not expressed in the phenotype.
What is a Punnett square?
A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.
A method for calculating the probability of genetic traits in offspring.
A chart that displays the physical characteristics of an organism.
A tool for measuring the genetic diversity within a population.
What is the law of segregation?
The law of segregation states that traits are inherited independently of one another.
The law of segregation states that during the formation of gametes, the two alleles for a trait separate from each other.
The law of segregation states that dominant alleles mask the effects of recessive alleles.
The law of segregation states that all alleles are expressed equally in the phenotype.
