Answer:
chromosomes.
Explanation:
Chromosomes occur as strands of long-chain protein molecules called DNA. Chromosomes are made up of two strands each called chromatid . The chromatids are joined at a point called centromere. During prophase, the chromosomes become tightly coiled and so appear shorter and thicker. Parts of chromosomes form functional units called genes which determine different activities of the cell. Genes are hereditary and can be transmitted from parent to off-spring.
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The movement of the ocean's crust
Answer:
The correct answer is b. decreased genetic difference between the two populations
Explanation:
The gene flow between two population always reduce the genetic difference between the two population because it increases the homogeneity between the population.
If there is greater gene flow between the two populations genes will be shared and transferred between the individual of two population which will make the two gene pool to become more and more similar.
This will increase the fitness of both the population because more allele will add to the two populations. Therefore the correct answer is b.
