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WorksheetsHeredity and variation
Total questions: 15
Worksheet time: 8mins
When two parents are crossed, the offspring are referred to as
Test cross
F1 Generation
Dominant
F2 Generation
The science of heredity is known as
Biology
Genetics
Biotechnology
Physiology
A plant with two 'small' genes breeds with a plant with two 'tall' genes to produce
small plants and tall plants in the ratio 1 : 3
all small plants
all tall plants
tall plants and small plants in the ratio 3 : 1
Which of the following may be used to obtain an F2 generation?
allowing flowers on a parent plant to be self-pollinated
allowing flowers on an F1 plant to be self-pollinated
cross-pollinating an F1 plant with a parent plant
cross-pollinating two parent plants
The visible characteristic in an organism is known as
prototype
stereotype
phenotype
Genotype
The exchange of genetic material takes place in
vegetative reproduction
asexual reproduction
sexual reproduction
Budding
The number of pair(s) of sex chromosomes in the zygote of humans is
1
3
2
4
A trait in an organism is influenced by
paternal DNA only
maternal DNA only
both maternal and paternal DNA
neither by paternal nor by maternal DNA.
The sex of a child is determined by which of the following?
the length of the mother's pregnancy
the presence of a Y chromosome in a sperm
the length of time between ovulation
the presence of a Y chromosome in a sperm
If the ratio of each phenotype of the seeds of pea plants in the F2 generation is 9 : 3 : 3 : 1, it is known as
monohybrid ratio
Dihybrid ratio
Tri hybrid ratio
Tetra hybrid ratio
Which of the following is not controlled by genes?
Eye colour
Height
Hair colour
None of the above
When a new plant is formed as a result of cross-pollination from different varieties of a plant, the newly formed plant is called
Dominant plant
Mutant plant
Hybrid plant
Recessive plant
_______ is the observable set of characteristics of an organism
Phenotype
Genes
DNA
All of the above
The phenomenon where individuals of a species exhibit differences in characteristics are called
Adaptation
Evolution
Variation
All of the above
The phenotypic ratio of dihybrid cross is
1:1
3:1
9:3:3:1
1:3
