How can we help?

You can also find more resources in our Help Center.

22 terms

7th Science Vocab by Alison

STUDY
PLAY
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