Total points: 20 for Attempt on all questions
ONE Concept Map: 10 points
Gregor Mendel’s Discoveries
1. Explain how Mendel’s particulate mechanism differed from the blending theory of inheritance. • Blending: parents genes mixed • Particulate: parents genes still retain identity\ The blending theory was that genetic material contributed by the two parents mixes in a manner analogous to the way blue and yellow make green. It predicts that over generations, freely mating populations will eventually becoming a uniform population of individuals. According to Mendel’s particulate hypothesis of inheritance, the gene idea was that parents pass on discrete heritable units that retain their separate identities in offspring.
2. Define the following terms: true-breeding, hybridization, monohybrid cross, P generation, F1 generation, and F2 generation.
True breeding: When true-breeding plants self-pollinate, all their offspring are of the same variety. For example, purple flowers give rise to plants with purple flowers.
Hybridization: The crossing of two true-breeding varieties is hybridization.
Monohybrid cross: A monohybrid cross is a genetic cross using a single trait with two alleles.
P generation: The true-breeding parents are referred to as the P generation, or parental generation.
F1 generation: The hybrid of the P generation is the F1 generation, or the first filial generation.
F2 generation: The offspring of the self-fertilizing F1 generation is the F2 generation, or second filial generation.
3. List and explain the four components of Mendel’s hypothesis that led him to deduce the law of segregation. • Alleles make different characters • Two alleles inherited • Dominance and recessive • Alleles segregate in gamete formation First, alternative versions of genes account for variations in inherited characters. A gene exists in different versions. Second, for each