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Genes and Alleles

Biology ⇒ Genetics and Heredity

Genes and Alleles starts at 7 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Genes and Alleles. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 7
A pea plant has the genotype Tt for height. Is it homozygous or heterozygous?
If a child inherits a 'B' allele from one parent and a 'b' allele from the other, what is the child’s genotype?
If a gene has three alleles, how many alleles does an individual inherit for that gene?
If a gene has two alleles, T (tall) and t (short), what are the possible genotypes for this gene?
If a mother has genotype Bb and a father has genotype bb, what are the possible genotypes of their children?
What do we call the genetic makeup of an organism?
What do we call the process by which traits are passed from parents to offspring?
What is a gene?
What is a recessive allele?
What is meant by the term 'heterozygous'?
What is the difference between a dominant and a recessive allele?
What is the function of genes in living organisms?
What is the main role of alleles in genetics?
What is the relationship between genes, DNA, and chromosomes?
A gene for fur color in rabbits has two alleles: F (black fur) and f (white fur). If a rabbit has the genotype Ff, what color will its fur be if F is dominant?
A scientist discovers a new gene in a species of bird that controls beak shape. This gene has two alleles: B (broad beak) and b (narrow beak). If two birds with genotype Bb mate, what is the probability that their offspring will have a narrow beak?
Describe the difference between a gene and an allele using an example from any plant or animal.
Explain how it is possible for two parents with brown eyes to have a child with blue eyes, considering the concept of dominant and recessive alleles.
A gene for feather color in a bird species shows incomplete dominance. The allele B produces blue feathers, and the allele W produces white feathers. Birds with genotype BW have light blue feathers. If two BW birds mate, what are the possible genotypes and phenotypes of their offspring?
Describe how mutations in genes can lead to new alleles and give an example of how this might affect an organism.