Answer:
C is the best answer
Explanation:
Crossing over is generally random and not goal oriented. So it does not always happen but it is likely to occur is it is an evolutionary advantage since it makes us more diverse. It involves the reciprocal exchange (NOT deletion) of segments between two homologs.
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Answer:
The correct answer is "4"
Explanation:
Selfing or self-fertilization occurs when female and male gametes coming from the same organism originate a new organism. The genetic consequence of self-fertilization is that genetic loci that were heterozygous are eventually displaced to homozygous. In the case that a single heterozygous Tt pea plant have its progeny exclusively by self-fertilization is that for each generation half of the genetic loci that were heterozygous is going to be lost. Therefore in F1: 50% would be heterozygous, in F2: 25%, in F3: 12.5% and by F4, only 6.25% would be heterozygous. Therefore it would take 4 generations to attain approximately 94 percent homozygosity.
Answer:
Plants use CO2 to photosynthesise