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WorksheetsGCSE inheritance
Total questions: 25
Worksheet time: 12mins
What term is used to describe a version of a gene?
allele
genotype
phenotype
heterozygous
What term is used to describe an organism that carries two identical alleles for a gene?
dominant
recessive
homozygous
heterozygous
What term is used to describe an organism that carries two different alleles for a gene?
dominant
recessive
homozygous
heterozygous
What term is used to describe the observable features of an organism due to its genotype?
inheritance
phenotype
dominant
allele
Gary and Fiona are both healthy but produce a child with a genetic disease caused by a recessive allele.
Which of the following must be true?
The child could be heterozygous
Gary is homozygous and Fiona is heterozygous
Gary and Fiona are both homozygous
Gary and Fiona are both heterozygous
A plant has two different alleles of a gene, G, resulting in it having a green seed.
Which row of the table describes the phenotype and genotype of the seeds of this plant?
A
B
C
D
The pedigree chart shows the inheritance of a genetic disorder in a family.
What conclusion can be made about this genetic disease?
The genetic disorder is dwarfism
It is caused by a dominant allele
It is caused by a recessive allele
It is caused by codominant alleles
The pedigree chart shows the inheritance of a genetic disorder in a family.
What conclusion can be made about this genetic disease?
The genetic disorder is dwarfism
It is caused by a dominant allele
It is caused by a recessive allele
It is caused by codominant alleles
In a certain plant, the allele fo white fruit (W) is dominant over the allele for yellow fruit (w).
A white-fruited plant was crossed with a yellow-fruited plant.
About half of the offspring were white-fruited and the other half were yellow-fruited.
Which genotypes did the parent plants have?
ww and www
Ww and ww
WW and ww
WW and Ww
The colour of a mouse's fur is controlled by a single pair of alleles.
A mouse with black fur was crossed with a mouse with white fur. All of the offspring had black fur.
What would be the likely ratio in several generations of offspring, if two of these black offspring were crossed?
1 black fur : 3 white fur
2 black fur : 2 white fur
3 black fur : 1 white fur
4 black fur : 0 white fur
How many alleles for each gene are carried in all body cells?
1
2
3
4
What is discontinuous variation from?
The environment
Inheritance
Both
None of the above
What are the base pairing rules for DNA?
A always pairs with T, and G with C
A always pairs with C, and G with T
A always pairs with U, and G with C
A always pairs with G, and C with T
A section of DNA that codes for a specific protein
gene
genome
amino acids
RNA
The basic building blocks of proteins.
genes
amino acids
RNA
DNA
The study of the inheritance of traits
Genetics
Biology
DNA-ology
Gene-ometry
An allele that masks or covers up the other gene.
dominant
recessive
genotype
phenotype
An allele that is easily covered or hidden.
genotype
phenotype
dominant
recessive
What's the probability an offspring will have the dominant Brown Eyes in this Punnett Square
25%
50%
75%
100%
hereditary material with the instructions to make an organism
DNA
dominant trat
phenotype
heterozygous
passes genetic information onto the offspring
recessive
genotype
phenotype
parent
two different alleles for a trait
examples: Bb, Nn, Yy
genotype
phenotype
homozygous
heterozygous
two identical (same) alleles for a trait
examples: BB, NN, nn
genotype
phenotype
homozygous
heterozygous
gene most likely to stay hidden or covered up;
shown with a lowercase letter
dominant
recessive
phenotype
offspring
gene that covers up another form of the trait;
the "stronger" trait;
shown with a capital letter
dominant
recessive
parent
genotype
