7th Science Vocab by Alison
About this set
Created by:
lvascience on March 5, 2012
Subjects:
Log in to favorite or report as inappropriate.
Order by
22 terms
Terms | Definitions |
|---|---|
Heredity | The passing of physical characteristics from parents to offspring |
Trait | Each different form of a characteristic, such as stem height or seed color |
Genetics | Scientific study of heredity |
Fertilization | When a new organism begins to form when egg and sperm cells join together |
Purebred | The offspring of many generations that have the same form of a trait |
Gene | Factors that control a trait (contains 2 alleles) |
Alleles | The different forms of a gene |
Dominant Allele | One whose trait always shows up in the organism when the allele is present |
Recessive Allele | Hidden whenever the dominant allele is present |
Hybrid | An organism that has 2 different alleles for a trait |
Probability | A number that describes how likely it is that an event will occur |
Punnett Square | Chart that shows all the possible combinations of alleles that can result from a genetic cross |
Phenotype | An organism's physical appearance or visible traits |
Genotype | An organism's genetic makeup, or allele combinations |
Homozygous | An organism that has 2 identical alleles for a trait (purebred) |
Heterozygous | An organism that has 2 different alleles for a trait (hybrid) |
Codominance | When both alleles for a gene are expressed equally |
Incomplete Dominance | When one allele is only partially dominant |
Polygenic Inheritance | When more than one gene affects a trait |
Inherited Trait | Trait someone is born with |
Acquired Trait | Trait that is caused by physical action (environment) Not born with it |
Meiosis | Process by which the number of chromosomes is reduced by half to form sex cells- sperm and eggs |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.