Genes and Alleles
Biology ⇒ Genetics and Heredity
Genes and Alleles starts at 7 and continues till grade 12.
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A man with genotype Aa marries a woman with genotype aa. What is the probability that their child will be homozygous recessive?
A person with genotype IAIB for the ABO blood group system will have which blood type?
A woman with genotype IAi and a man with genotype IBi have a child. What are the possible blood types of their child?
Describe how environmental factors can influence the expression of genes.
A man with genotype Aa marries a woman with genotype aa. What is the probability that their child will be homozygous recessive?
A person with genotype IAIB for the ABO blood group system will have which blood type?
A woman with genotype IAi and a man with genotype IBi have a child. What are the possible blood types of their child?
In Mendel's pea plant experiments, the allele for tall plants (T) is dominant over the allele for short plants (t). What is the phenotype of a plant with genotype Tt?
Which of the following best describes a test cross? (1) Crossing two homozygous individuals (2) Crossing an individual with a dominant phenotype with a homozygous recessive individual (3) Crossing two heterozygous individuals (4) Crossing two individuals with the same phenotype
Which of the following best describes an allele? (1) A type of cell (2) A variant form of a gene (3) A chromosome (4) A protein
Which of the following genotypes will express the dominant phenotype if 'A' is dominant over 'a'? (1) AA (2) Aa (3) aa (4) Both 1 and 2
Which of the following is an example of a gene with multiple alleles in humans? (1) Eye color (2) ABO blood group (3) Sickle cell gene (4) Hemophilia gene
Fill in the blank: The alternative forms of a gene are called _______.
Fill in the blank: The observable characteristics of an organism are known as its _______.
Fill in the blank: The process by which alleles are exchanged between homologous chromosomes during meiosis is called _______.
Fill in the blank: The set of alleles that an individual possesses is called its _______.
True or False: A person with genotype 'aa' for a gene with alleles 'A' and 'a' will express the dominant trait.
True or False: All alleles of a gene produce the same phenotype.
True or False: Each individual can have more than two alleles for a single gene.
True or False: In a dihybrid cross, the alleles of different genes assort independently if the genes are on different chromosomes.
