What is allelic exclusion of immunoglobulin genes?
What will be an ideal response?
Ans: Each lymphocyte expresses one rearranged light chain genes and one rearranged heavy chain gene on only one of the two homologous chromosomes. The homologous genes are not expressed.
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Which genetic disorder is governed by a single gene?
a. Cystic fibrosis b. Albinism c. Huntington's syndrome d. Sickle Cell anemia e. All are governed by a single gene.
Which of the following is false regarding water's specific heat?
A) The specific heat of water is 1.0 calorie per gram. B) Heat applied to water must initially break a number of hydrogen bonds. C) Water's high specific heat has a temperature-buffering effect. D) Water gains and loses heat more slowly than most other liquids do. E) The specific heat of water is similar to that of most liquids.
Genetic variation leads to genetic diversity in populations and is the raw material for evolution. Biological systems have multiple processes, such as reproduction, that affect genetic variation
They are evolutionarily conserved and shared by various organisms. Which statement best represents the connection between reproduction and evolution? A) Plants that use sexual reproduction are rare since this type of reproduction in plants does not contribute to genetic diversity. B) In order to increase genetic diversity for evolution in sexually reproducing organisms, mutations must occur in the zygote after fertilization. C) Since prokaryotic organisms reproduce asexually, there is no mechanism for them to add genetic diversity for evolution. D) Sexual reproduction increases genetic variation because random mutations can be shuffled between organisms.
What is the symbol for sodium?
A. Na B. Dm C. So D. N E. S