Chapter 12 Book Flashcards
What is the study of heredity
genetic
who set the genetic framework
Johann Gregor mendel
What did Mendel use
Pea plants
About how many plants did Mendel examine
30,000
What is the Blending Theory of Inheritance
original parental traits were lost or absorbed by blending in the offspring
What is continuous variation
when many genes determine a characteristic and “blend” (height)
What is discontinuous variation
traits inherited in distince classes like violet or white
Did Mendel work with continuous or discontinuous variation
Discontinuous
Why did Mendel use pea plant (3)
self fetilizing (true breeding possible), Grow to maturity in one season (evaluate many generations under a short term), and cultivate large quantities at one (eliminate possibility of chance
What are hybridizations
mating two breeding individuals with different traits
what is a trait
variation in physical appearance of a heritable characteristic
What is the product rule
2 independent events occuring together can multiply the probabilities
What is the sum rule
occurrence of one event or the other is the sum of the probabilities
What is an allele
Gene variation
What is a test cross and what are the results
cross dominant phenotype with homologous recessive
if homozygous, all dominant phenotypes
if heterozygous, half will be dominant and half recessive
