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KengaRu [80]
4 years ago
7

Why do animal cells have centrioles but plant cells do not?

Biology
1 answer:
cestrela7 [59]4 years ago
6 0
Animals have centrioles to form spindle fibers during prophase. The centriole divides cells. Plants dont have them because they have microtubules instead. they dont need centrioles. Plants are capable of forming a circular loop of microtubules around the future plane of division prior to prophase called the preprophase band, rather than centrosome. Basically- plants don't need it. They have a different way of cell division.
---Source from another user who asked the same question.
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Answer:

The result of cross two squashes with yellow seeds is an offspring of squash with green seeds -dominant caracter- heterozygous and yellow seeds squashes in a genotype proportion 1:2:1  and phenotype proportion 3:1

Explanation:

The cross of two heterozygous individuals for a characteristic results in an offspring that will have both characteristics in pure and heterozygous form. It is a cross monohybrid which complies with the principle of independent segregation exposed by Mendel.

For the characteristic "seed color" the green color would be G and yellow represented as g.

At the cross of two heterozygous squashs:

- Parents: Gg X Gg

- <u>Punnett's Square</u>:

Alleles    G         g

G           GG       Gg

g           Gg        gg

Offspring:

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Genotype proportion 1:2:1

Phenotype proportion 3:1

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