A.increasing variation
B.decreasing variation
C.eliminating variation
2007-12-21 03:14:26 · 4 answers · asked by ian t 1 in Science & Mathematics ➔ Botany
A
Crossing over produces gametes that have new combinations of maternal and paternal alleles, leading to greater amounts of variation.
2007-12-21 03:21:42 · answer #1 · answered by hcbiochem 7 · 0⤊ 0⤋
Crossing-over allows the mixture of alleles to recombine. Consider two traits are on nearby genesand an individual with a deleterious version of the first and and a roughly equally advantageous version of the second (compared to the major "wild-type" versions in the population). That individual will have about the same chance of passing on the genes. Crossing-over may result in the advantageous gene may winding up near the "wild type" gene giving some offspring the advantage without the disadvantage. That chromosome will tend to appear in the population at a higher frequency. On the other hand, some offspring will get the deleterious version without the advantageous version. That chomosome will tend to fade from the population.
2016-05-25 07:32:23 · answer #2 · answered by ? 3 · 0⤊ 0⤋
A.
Crossing over causes exchange of genetic matter.During meiosis,newer varieties of gametes are formed.Thus increasing the variations.
2007-12-22 22:33:24 · answer #3 · answered by osanctum 3 · 0⤊ 0⤋
No
2007-12-21 03:38:54 · answer #4 · answered by Anonymous · 0⤊ 0⤋