Biological Approach 4 - Genetics

A __________________is a thread-like structure that contains a DNA molecule

• Chromosome

• DNA

• Gene

• Allele

______________ has a characteristic structure of the double helix and stores information.

• Chromosome

• DNA

• Gene

• Allele

• A ______ is a unit of heredity, a region of DNA that encodes a specific trait or function

• Chromosome

• DNA

• Gene

• Allele

• ______ are different forms of the gene. They can be dominant or recessive.

• Chromosome

• DNA

• Gene

• Allele

• The set of traits as coded in an individual’s DNA is called ___________

• Genotype

• Phenotype

• The set of traits that actually manifest in an individual’s body, appearance or behaviour is called _____________

• Genotype

• Phenotype

• The process when chemicals are added to the DNA molecule, and so repress gene transcription, is known as ____________

• Expression

• • Methylation

• Biologically, genotype becomes manifested as phenotype through a process called gene ____________

• Expression

• • Methylation

Genetic ___________ is the quantitative measure of the relative contribution of genetic factors into a trait or behaviour - the genetic impact on trait differences in a particular population, ranges from 0 to 1

The type of study that focuses on

Estimating the similarity between identical (monozygotic—MZ) twins and comparing it to the similarity between fraternal (dizygotic—DZ) twins.

• Twin studies

• Family studies

• Adoption studies

• Molecular genetics