The heredity problem
1.[3p] What is Jenkin's swamping objection?
What is Jenkin's swamping objection?
The answer is: Under blending, a favourable novelty is halved every generation and is diluted away before selection can act
The answer is: Under blending, a favourable novelty is halved every generation and is diluted away before selection can act
The answer is: Under blending, a favourable novelty is halved every generation and is diluted away before selection can act
2.[2p] Under strict blending the variance halves each generation. What percentage of the original variance remains after 5 generations?
Under strict blending the variance halves each generation. What percentage of the original variance remains after 5 generations?
3.[2p] Under blending inheritance, a population becomes uniform even with no selection acting at all.
Under blending inheritance, a population becomes uniform even with no selection acting at all.
The answer is: True
4.[3p] What is the single observation in Mendel's F2 that kills blending?
What is the single observation in Mendel's F2 that kills blending?
The answer is: Wrinkled seeds reappear unchanged after a generation of complete concealment
The answer is: Wrinkled seeds reappear unchanged after a generation of complete concealment
The answer is: Wrinkled seeds reappear unchanged after a generation of complete concealment
5.[2p] Mendel counted 5,474 round and 1,850 wrinkled F2 seeds. What is the observed ratio of round to wrinkled?
Mendel counted 5,474 round and 1,850 wrinkled F2 seeds. What is the observed ratio of round to wrinkled?
6.[2p] A dihybrid F2 of 556 seeds is tested against 9:3:3:1. How many round yellow seeds are expected?
A dihybrid F2 of 556 seeds is tested against 9:3:3:1. How many round yellow seeds are expected?
7.[3p] What did R. A. Fisher show about Mendel's data in 1936?
What did R. A. Fisher show about Mendel's data in 1936?
Select all that apply
The answer is: The agreement with the expected ratios is closer than sampling would ordinarily give, Scoring true-breeding plants from ten seeds misclassifies about 5.6 per cent of segregating plants, The total chi-square was about 41.6 on 84 degrees of freedom
8.[2p] What breaks independent assortment, as Morgan's group explained from 1911?
What breaks independent assortment, as Morgan's group explained from 1911?
9.[3p] Match each camp or person to their position after 1900.
Match each camp or person to their position after 1900.
Bateson
de Vries
Pearson
Weldon
measured the resemblance between relatives
new species arise in a single mutational step
continuous characters are what selection acts on
discrete factors, evolution by jumps
Show the answer
Bateson: discrete factors, evolution by jumps de Vries: new species arise in a single mutational step Pearson: continuous characters are what selection acts on Weldon: measured the resemblance between relatives