Worksheets9A End of Unit Revision Quiz
Total questions: 21
Worksheet time: 12mins
What are the four bases of DNA?
ATGC
ATDC
GCAS
DNAB
What is the function of the X and Y chromosomes?
Eye colour
Hair colour
Height
Sex
Why does Scar have a scar but his brother Mufasa does not?
Mufasa did not inherit it
The scar gene skipped a generation
The scar is an environmental trait
Mufasa is not his brother
What is the definition of the phenotype?
The physical traits of an organism
The genetic makeup of an organism
The letters eg, Aa
How the genotype is expressed.
Which answer includes the dominant homozygous genotype?
AA
Aa
aa
Which answer contains the heterozygous genotype?
AA
aa
Aa
What is the definition of an allele?
An allele is a variety of a gene.
An allele is the genetic makeup of an organism
An allele is another word for a gene.
What is the definition of a genotype?
The genetic makeup of an organism
The physical traits of an organism.
When one allele is dominant and one allele is recessive.
When both alleles are dominant.
Sperms can have
Only X chromosome
Only Y chromosome
Either X or Y chromosome
Either XX or XY chromosomes
Ova (eggs) can have
Only X chromosome
Only Y chromosome
Either X or Y chromosome
Only XX chromosomes
What is the percentage of a woman having a male child?
25%
50%
75%
100%
A dominant trait expresses itself
only in homozygous genotypes
only in heterozygous genotypes
both in homozygous and heterozygous genotypes
