OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They had a lot of resistance to disease.
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They had a few plants that were resistant to the disease.
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They had too much variation in their genes.
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They had little variation in their genes.
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Detailed explanation-1: -Fusarium wilt of watermelon is a soilborne fungus disease that occurs statewide. The disease can cause considerable damage where susceptible varieties are grown because entire plants are killed prior to harvest.
Detailed explanation-2: -Seedless watermelons are triploid (3X) which causes them to be sterile, or seedless. The triploid seeds are created by crossing a normal diploid (2X) melon as the pollinator with a tetraploid (4X) parent. Each parent contributes half its respective chromosomes, 1X from one parent and 2X from the other.
Detailed explanation-3: -The normal watermelon (called a diploid) has 22 chromosomes per cell. By treating seedlings with colchicine, a new plant type called a tetraploid having 44 chromosomes is produced.
Detailed explanation-4: -But this does not happen. Why? Because every seed do not have the power to fertilization.