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Heredity

Review Genetics and Punnett Squares

QuestionAnswer
Gene The different kinds of genetic information that can be found on DNA.
DNA Deoxyribonucleic acid, holds all the genetic information for organisms. Called the blueprint of life.
double helix The two stranded and twisted shape of DNA.
nucleotides The building blocks of DNA. Made up of a phosphate, deoxyribose sugar, and nitrogenous base.
nitrogenous base The middle part, or rungs, of DNA. Consists of adenine, thymine, guanine, and cytosine.
heredity The passing of genetic information from one generation to another.
trait A specific characteristic or feature in an organism.
Alleles Different forms of a specific trait.
Dominant allele Refers to the allele that masks or hides the appearance of the other allele.
Recessive allele Refers to the allele that is covered by or masked by the other allele.
homozygous When both alleles for a trait are the same.
heterozygous When both alleles for a trait are different.
Genotype The set of genes that are responsible for a specific trait.
Phenotype The physical appearance or symptoms that we notice in an organism.
Punnett Square A graphic tool used to predict all possible combinations of offspring from a set of parents.
Codominance When the dominant trait and recessive traits are seen in the phenotype of the offspring.
Incomplete Dominance When the heterozygous genotype blends the dominant and recessive phenotypes.
Created by: kdwilliams372
 

 



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