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Topic #7 SECOND HALF

These are the terms from the SECOND HALF of the topic only.

TermDefinition
genetics the study of how traits are inherited
heredity passing of traits from parents to offspring
trait a characteristic that is caused by genes
allele different versions of a gene that cause the variations of a trait
dominant the form of a gene that covers up (dominates) the weaker form of the gene
recessive the form of a gene that gets covered up if the dominant form of the gene is present
Punnett square a tool to predict possible offspring’s genes based on parents’ genes (invented by Reginald Punnett 50 years after Mendel’s studies of pea plants)
gamete science name for a reproductive cell; examples are sperm and egg
zygote science name for a fertilized egg cell when it is still just a single cell
homozygous when both alleles in a pair are the same (both dominant or both recessive)
heterozygous when the two alleles in a pair are different (one is dominant and one is recessive)
genotype a pair of capital and/or lower case letters to represent an organism’s genetic makeup
phenotype the physical trait that shows up because of an organism’s genotype
probability a measurement of the chance (likelihood) of an event happening
independent when the chance of one event happening does not affect the chance of another event happening
pedigree a branching chart with symbols to show relationships of genetic traits for multiple generations of a family – also called a family tree
Created by: wholt