Genetics MCQs with Answers

In humans, what is the sex genotype for a male?

What is the term for alternative forms of a gene that arise by mutation and are found at the same locus on homologous chromosomes?

What is the term for the probability that an individual will develop a particular trait or disorder?

What genetic disorder results from the inheritance of a mutated allele on the X chromosome, leading to progressive muscle degeneration?

What term describes the presence of more than two alleles for a genetic trait within a population?

Which law states that alleles segregate independently of each other during gamete formation, such that each gamete has an equal probability of receiving either allele?

Which law states that alleles of different genes assort independently during gamete formation?

What is the term for an individual who has two identical alleles for a particular gene?

What is the term for the study of how genes are inherited and expressed?

What term describes the inheritance pattern where multiple genes influence the phenotype of a trait?

What is the term for the specific genetic makeup of an individual, usually with reference to a particular characteristic under consideration?

Which genetic disorder is characterized by the inability to produce melanin pigment?

How many alleles does a diploid organism inherit for each gene?

What term refers to a change in the nucleotide sequence of DNA that may or may not alter the function of a gene?

Which term refers to the physical appearance of an organism?

What is the probability of producing an offspring with the dominant phenotype in a cross between a heterozygous dominant parent (Aa) and a homozygous recessive parent (aa)?

What term refers to the study of the inheritance of traits controlled by a single gene?

What is the term for a diagram that shows the probable distribution of alleles in offspring from a genetic cross?

What is the term for the condition in which one gene influences multiple traits?

What is the term for the specific location of a gene on a chromosome?

In a dihybrid cross (AaBb x AaBb), what is the phenotypic ratio of the offspring?

What is the likelihood that two carriers (Aa) of a recessive genetic disorder will have an affected child (aa)?

What is the term for the mating of two individuals that differ at one genetic locus?

What is the term for a segment of DNA that codes for a specific trait?

What is the sex-determining chromosome pair in humans?

What is the likelihood that a child will inherit a recessive disorder from two carrier parents (Aa x Aa)?

What is the term for the observable traits of an organism, determined by both genetic and environmental factors?

In a monohybrid cross between two heterozygous individuals (Aa x Aa), what is the probability of producing an offspring with the homozygous recessive genotype?

What is the genotype of a homozygous recessive individual for a particular trait?

What is the basic unit of heredity?

In Mendel's experiments, what is the term used for the offspring resulting from a cross between two true-breeding individuals?

Which genetic disorder is caused by a trisomy of chromosome 21?

What type of inheritance pattern is observed when both alleles contribute equally and fully to the phenotype?

What type of inheritance pattern results in the blending of traits from the parental generation to produce intermediate phenotypes in the offspring?

Which term describes an individual with two different alleles for a particular gene?

What is the probability of crossing two heterozygous individuals (Aa x Aa) and producing offspring with the homozygous recessive genotype?

What genetic disorder results from a mutation where individuals have an extra X chromosome (XXY)?

In humans, what is the sex genotype for a female?

What is the term for the allele that is expressed in a heterozygous individual?

What is the term for the alleles an individual has for a particular trait?