Genes and Alleles
Biology ⇒ Genetics and Heredity
Genes and Alleles starts at 7 and continues till grade 12.
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See sample questions for grade 8
Describe what is meant by the term 'genetic variation'.
Explain why two organisms with the same phenotype might have different genotypes.
If a child inherits a dominant allele from one parent and a recessive allele from the other, which trait will be expressed?
If a gene has three possible alleles, how many alleles does an individual organism inherit for that gene?
Fill in the blank: The gene for flower color in a plant has two alleles, R (red) and r (white). The genotype Rr will result in ________ flowers if R is dominant.
If a child inherits a dominant allele from one parent and a recessive allele from the other, which trait will be expressed?
If a gene has three possible alleles, how many alleles does an individual organism inherit for that gene?
If a gene has two alleles, A (dominant) and a (recessive), what are the possible genotypes?
Which of the following best describes a recessive allele? (1) It is always expressed (2) It is only expressed when two copies are present (3) It is never expressed (4) It is stronger than a dominant allele
Which of the following best describes an allele? (1) A type of cell (2) A version of a gene (3) A chromosome (4) A protein
Which of the following best describes the term 'allele'? (1) A type of protein (2) A version of a gene (3) A cell structure (4) A type of chromosome
Which of the following genotypes is heterozygous? (1) AA (2) Aa (3) aa (4) BB
Fill in the blank: A ________ allele is masked by a dominant allele.
Fill in the blank: The gene for flower color in a plant has two alleles, R (red) and r (white). The genotype Rr will result in ________ flowers if R is dominant.
Fill in the blank: The observable characteristics of an organism are called its ________.
Fill in the blank: The set of alleles that an organism has is called its ________.
True or False: A genotype of AA will always result in the dominant phenotype.
True or False: A person inherits one allele for each gene from each parent.
True or False: All alleles for a gene are inherited from only one parent.
True or False: All traits are controlled by a single gene.
