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Genetics Vocabulary
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Terms in this set (27)
monohybrid cross
a cross in which only one characteristic is tracked
punnet square
diagram that can be used to predict the genotype and phenotype combinations of a genetic cross
Genotype
An organism's genetic makeup, or allele combinations.
Phenotype
An organism's physical appearance, or visible traits.
ratio
a comparison of two numbers by division
Example of Codominance
Example of incomplete dominance
Example of polygenic inheritance
skin color
Definition of Polygentic Inheritance
Traits that are controlled by one or more genes
Gene
A segment of DNA on a chromosome that codes for a specific trait
Genetics
The scientific study of heredity
Heredity
Passing of traits from parents to offspring
Alleles
Different forms of a gene
Homozygous
An organism that has two identical alleles for a trait
Heterozygous
An organism that has two different alleles for a trait
Definition of incomplete dominance
when a dominant allele is not completely dominant
Definition of codominance
When both alleles are expressed equally in the heterozygous state
Gametes
sex cells
The number of genotype possibilities in MENDELIAN GENETICS
3
The number of phenotype possibilities in MENDELIAN GENETICS
2
2 alleles
One gene ussually represented by...
alleles are represented by
capital and lower case letters
A dominant allele is ______ powerful than a recessive allele
more
Types of Non-Mendelian Inheritance
Codominance, Incomplete Dominance, Polygenetics, Multiple Allels, Sex-Linked
Two dominant alleles, like this (HH), are considered
Homozygous dominant
Two recessive alleles, like this (hh), are conisidered
Homozyogus recessive
A dominant allele and a recessive allele, like this (Hh), are considered
Heterozygous dominant
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