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zloy xaker [14]
3 years ago
9

What are the 9 major phylum of animals. how many are invertebrates

Biology
1 answer:
alexgriva [62]3 years ago
6 0
<span>The eight major phyla of invertebrates are Porifera, Cnidaria, Platyhelminthes, Annelida, Most animals are invertebrates, and most of those are arthropods.</span><span>
</span>
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Hypothesize what would happen if the sister chromatids did not split equally during anaphase of mitosis.
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Answer:

Sometimes during anaphase, chromosomes will fail to separate properly. This is called nondisjunction. Nondisjunction results in cells with abnormal numbers of chromosomes. Instead, one pair of sister chromatids failed to split, resulting in one cell with 5 chromosomes and one cell with 3 chromosomes.

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Metaphase: chromosomes align in the center of the cell at the metaphase plate.

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Telophase: reverse of prophase.

Each sister chromatid of a chromosome has spindle fibers attached to it. These spindle fibers begin to shorten and pull the sister chromatids apart at the centromere. This process of is called disjunction. Now each chromatid is called a daughter chromosome or just a chromosome.

The spindle fibers continue to shorten and move towards opposite ends or poles of the cell. There are also two distinct sets of chromosomes now, and each daughter cell will get one set.

Sometimes during anaphase, chromosomes will fail to separate properly. This is called nondisjunction. Nondisjunction results in cells with abnormal numbers of chromosomes. Instead, one pair of sister chromatids failed to split, resulting in one cell with 5 chromosomes and one cell with 3 chromosomes.

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