3 years ago

What is different between a grasshoper's Sheleon and yours

Biology

1 answer:

goblinko [34]3 years ago

3 0

We have an internal skeleton and a grasshopper has an external skeleton.

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In pea plants, purple flowers are dominant over white flowers. The phenotype ratio of purple to white flowers in a population of

noname [10]

1. It’s 4 purple flowers to 1 white flower

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2 years ago

Cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be present in a g1 cell? if a cell at meta

kumpel [21]

Answer:

The correct answer would be 10.

The cell cycle can be divided into four phases namely gap 1 (G₁) phase , synthesis (S) phase, gap 2 (G₂) phase, and mitosis (M) phase.

DNA (deoxyribonuceic acid) content is only replicated and doubled in the S phase. However, the chromosome number remains the same. It can be explained as the number of chromosomes remains the same (2n) but number of chromatids doubles (4n) after S phase.

The number of chromatids restores to 2n in daughter cells after completion of mitosis.

Hence, if number of chromatids in metaphase was 20 i.e. 4n then the number of chromosomes (2n) would be 10.

Hence, 10 chromosomes or 5 pairs of chromosome would be present in the cell during its G₁ phase.