Inheritance MCQs with Answers

What is the term for an organism that has two identical alleles for a particular gene?

Which chromosome carries genes unrelated to an individual's sex?

What is the term for the genetic makeup of an organism, including both expressed and unexpressed alleles?

Which inheritance pattern involves the expression of both alleles in the heterozygous condition?

Which genetic disorder is characterized by the absence of an enzyme needed to break down lipids, leading to the accumulation of fatty substances in the brain?

What is the name for a gene that is always expressed, regardless of the presence of another allele?

In a monohybrid cross, what is the expected phenotypic ratio of the F2 generation if both parents are heterozygous?

What is the term for a trait determined by genes located on the sex chromosomes?

In a test cross, what is the purpose of crossing an individual with an unknown genotype with a homozygous recessive individual?

What is the term for a trait that is influenced by both genes and the environment?

Which inheritance pattern involves the blending of traits, resulting in an intermediate phenotype in heterozygous individuals?

What is the term for a genetic cross involving individuals with two different traits?

What is the probability of having a child with a recessive genetic disorder if both parents are carriers (heterozygous)?

What is the term for a trait determined by more than one gene?

What is the term for the physical or chemical agents that can cause mutations in DNA?

What is the probability of having a child with a dominant genetic disorder if one parent is affected and the other is unaffected (heterozygous)?

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

What is the term for the physical expression of a gene in an organism?

In humans, what is the sex chromosome complement of a female?

In humans, what is the sex chromosome complement of a male?

What is the expected phenotypic ratio in the F2 generation of a dihybrid cross between two heterozygous individuals?

In a Punnett square, what represents the possible gametes produced by each parent?

What is the probability of having a child with a dominant genetic disorder if both parents are affected (homozygous)?

What is the term for the physical appearance of an organism's traits?

Which law states that each pair of alleles segregates independently of other pairs during gamete formation?

Which chromosome determines the sex of an individual in humans?

What is the term for the genetic makeup of an organism for a particular trait?

Which scientist proposed the theory of inheritance through the transmission of acquired characteristics?

What is the term for the situation in which a single gene influences multiple traits?

In a Punnett square, what represents the possible genotypes produced by the union of gametes?

In codominance, what is the result when two different alleles for a gene are both expressed in the heterozygous condition?

Which genetic disorder is caused by the absence of an enzyme needed to break down phenylalanine?

Which scientist discovered the principle of genetic linkage by studying fruit flies?

Which genetic disorder results from the inability to produce melanin, leading to a lack of pigmentation in the skin, hair, and eyes?

In a dihybrid cross, how many different combinations of alleles can be produced in the gametes of the parents?

Which law states that pairs of alleles segregate independently during the formation of gametes?

Which scientist is known as the "father of modern genetics" for his work on the inheritance of traits in pea plants?

What is the term for alternative forms of a gene that occupy the same position on homologous chromosomes?

What is the term for an individual who carries one copy of a recessive allele for a genetic disorder but does not express the trait?

In Mendel's experiments, what is the term for a trait that is masked or hidden in the F1 generation but reappears in the F2 generation?