Question
How many kinds of genotypes are possible in F2, if four
genes are segregating independently?ÂSolution
When four genes are segregating independently in the F2 generation, the total number of possible genotypes can be calculated by taking 2 to the power of the number of gene pairs. For each gene pair, there are 3 possible genotypes (assuming a simple dominant/recessive model - homozygous dominant, heterozygous, homozygous recessive). Therefore, the total number of genotypes for four independently segregating genes is 34 = 81 Hence, the correct answer is (2) 81.
2,0, 9, 20, ‘?’, 714
7, 14, 42, 210, 1470, ?
6000 3002 1503 ? 378.75 191.375 97.6875
...41 48 89 137 226 ?
...31   48    67    90   ?      150
640 320 160 ? 40 20
Find the 31st term of the series 25, 29, 33……
140Â Â Â Â 300Â Â Â Â 380Â Â Â Â Â 420Â Â Â Â Â 440Â Â Â Â Â ?
...504 625 769 938 1134 ?
...14 26 50 98 194 ?
...
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