Human Heredity and Genetics Quiz

DNA carries genetic information in humans.

Allele refers to alternative forms of a gene.

Francis Crick is credited with proposing the double helix structure of DNA.

Recessive traits are expressed only in the homozygous condition.

Gregor Mendel first proposed the laws of inheritance.

Phenotype refers to the observable characteristics of an organism.

Down syndrome is caused by a trisomy of chromosome 21.

Locus refers to the specific location of a gene on a chromosome.

Tay-Sachs disease results from the absence of an enzyme responsible for breaking down lipids.

Mutation refers to a change in the DNA sequence leading to a different protein being produced.

Klinefelter syndrome is caused by the presence of an extra X chromosome in males.

Translocation refers to the process by which a segment of a chromosome breaks off and attaches to a different chromosome.

Meiosis results in the formation of gametes.

In humans, females have a sex chromosome composition of XX.

In humans, the genotype of a male individual is XY.

Phenotype refers to the observable characteristics resulting from the interaction of genotype and environment.

In humans, the X chromosome determines the sex of an individual.