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Unit 4A

Inherited Traits & DNA

TermDefinition
Heredity The transfer of traits from one generation to another generation.
Gregor Mendel the “father of modern genetics”, born in 1822, a monk, in Austria Mendel discovered the basic principles of heredity through experiments with pea plants.
Inherited Traits A characteristic or features of one organism that are inherited (passed from parent to offspring).
Dominant Traits Traits that hide other traits when passed on to offspring, and shows its specific trait even if only one parent passed the gene to the child.
Recessive Traits Traits that get hidden by dominant traits, and shows its specific trait when both parents pass the gene to the child.
Nucleus A small egg-shaped structure inside the cell that acts like the brain of the cell, which tells every part of the cell what to do, contains chromosomes and genes, and stores the cells hereditary material or DNA.
Chromosomes Thread-like structures that are found in the nucleus of a cell that contains all DNA, each chromosome is made of protein and a single molecule of DNA, and comes in matching sets of two.
DNA Deoxyribonucleic Acid is a molecule that carries the genetic instructions for all living organisms that contains the specific instructions that make each type of living creature unique, and determines how the cells in a body will function.
Genes A stretch of DNA on a chromosome with instructions for one trait, determine traits, and like chromosomes, they also come in pairs.
Acquired Traits Physical characteristic of an organism that is not passed down to offspring genetically, which is a learned trait, and is a product of the environment’s influence on the organism.
Created by: PRO Teacher dowdyp