Explain the circumstances that led to a debate about whether all inheritance cases could be explained by Mendelian
inheritance or whether there might be another, separate mechanism of inheritance that did not follow the laws of
segregation and independent assortment. Summarize the outcome of that debate. What will be an ideal response?
ANSWER: Geneticists turned up cases in which the F1 phenotypes were not identical to one of the
parents. In some cases, the offspring had a phenotype intermediate to that of the parents or a
phenotype in which the traits of both parents were expressed. Eventually, research showed
that although phenotypes can be somewhat complex, these cases were not exceptions to
Mendelian inheritance at the level of genotypes. Although phenotypes may not follow
predicted ratios, genotypes do obey the principles of Mendelian inheritance.
You might also like to view...
Many of the genes in the chloroplast genome encode proteins involved in ________, whereas mitochondrial genomes primarily encode proteins involved in ________
A) autotrophy / DNA replication B) photosynthesis / glycolysis C) autotrophy / glycolysis D) photosynthesis / oxidative phosphorylation
Which of the following pairs of traits are homologous?
a. butterfly wings and bat wings b. the surface areas of bird and bat wings c. the bones of bird and bat wings d. butterfly wings and bird wings e. bird wings and bat wings
What is the function of ribosomes?
a. plasma membrane stabilization b. receiving raw materials from the environment c. polypeptide assembly d. increasing tonicity e. directing the activity of DNA
Nervous tissue cells that generate and transmit electrical impulses are called glial cells.
a. true b. false