Campbell Biology Chapter 14 Flashcards


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updated 10 years ago by ebonee_coplin
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1

phenotype

the physical apparent trait of an organism

2

pleitropy

one genetic mutation leads to many different kinds of phenotypes

3

Punnet Square

a chart that shows all the possible combinations of alleles that can result from a genetic cross

4

recessive allele

an allele only expressed in the homozygous condition

5

Sickle cell disease

a genetic disorder in which erythroctyes take on an abnormal curved or sickle shape

6

trait

a characteristic of an organism that can be passed to offspring

7

tay- sachs

a lysosomal storage disease also an example of incomplete dominant trait

8

pedigree

family tree like structure with circles representing females and squares representing males that traces the passage of genetic traits over many generations

9

law of segregation

pairs of genes at a single gene locus separate during gamete formation creating single individualized genes in the resultant gamete sperm or egg

10

incomplete dominance

heterozygotes are blended in phenotype

11

alleles

alternate forms of the same gene