notwithstanding any possible new mutations)? Answer: C) What is the probability
ID: 274121 • Letter: N
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notwithstanding any possible new mutations)? Answer: C) What is the probability that each/every chromosome in the egg will be recombinant (i.e, have a mixture of paternal and maternal DNA/alleles)? Answer Problem 2 (Relative orders). Each selection (A and B) lists 4-8 entities in alphabetical order. For A, indicate the correct temporal sequence during a mitotic cell cycle (starting w/ a newly-formed daughter cell). For B, arrange names in historical order, based on dates of key contributions (from earliest to most recent). (For simplicity, please designate the correct order using the indicated numbers for each item.) A.1) anaphase ; 2) cytokinesis: 3) G,: 4) G, : 5) metaphase: 6) prophase; 7) S phase; 8) telophase S Correct order- 1 3 ??2 ? - B.1)Correns, Von Tschermak and DeVries 2)Mendel 3). Punnett 4). Sanger +0 Correct order 4 1.2,1,3Explanation / Answer
Problem 2.( A)
Mitotic cell division starts with G1 phase in which cell prepares for division. It is followed by S phase in which replication of DNA takes place. Then G2 phase starts in which cytoplasmic material gets assembled for mitotic division. Then starts prophase in which chromosomes condense and spindle fibers appear. Then starts metaphase in which chromosomes align. In anaphase sister chromatids align at opposite poles. Then in telophase chromosomes decondense and spindle fibres disappear. Finally in the stage of cytokinesis, cytoplasm divides and parent cell devides into two daughter cells.
So the correct sequence is: 3( G1), 7 (S phase), 4 ( G2 phase) ,6 prophase, 5 metaphase, 1anaphase , 8 telophase,. 2 cytokinesis
(B) Mendel in 1866 laws of inheritance.
Correns, Von tchermak and reveries in 1900 rediscovered Mendelian laws.
Punnet in 1910 devised punnet square to depict no and variety of genetic recombinations.
Sanger in 1980 gave base sequence of nucleic acids.
So the correct sequence from earliest to recent is:
Mendel, correns etal, punnet and Sanger.
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