Monozygotic twins are twins who are nearly identical, whereas dizygotic twins come from two separate ova.
Monozygotic twins- Identical twins, also known as monozygotic twins, are produced when a single egg is fertilized by a single sperm, resulting in the fertilized egg dividing into two. Identical twins always have the same sex and have the same DNA.
Dizygotic twins- Dizygotic twins are two siblings that develop from different ova, or eggs, that are produced from an ovary at the same time and are fertilized by different sperm. They are also known as fraternal twins or nonidentical twins.
Ova- In most anisogamous species, the female reproductive cell, or gamete, is the egg cell, or ovum (plural ova).
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Answer:
<u>Stores DNA</u>
Explanation:
The nucleus controls all the activities of a cell. The chromatin contains the hereditary materials, DNA while the nucleolus is responsible for the manufacture of ribosomes.
Answer:
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Analogy, in biology, similarity of function and superficial resemblance of structures that have different origins. For example, the wings of a fly, a moth, and a bird are analogous because they developed independently as adaptations to a common function—flying.
Analogies are the result of convergent evolution. Interestingly, though bird and bat wings are analogous as wings, as forelimbs they are homologous. Birds and bats did not inherit wings from a common ancestor with wings, but they did inherit forelimbs from a common ancestor with forelimbs.
Convergent evolution is the independent evolution of similar features in species of different lineages. Convergent evolution creates analogous structures that have similar form or function but were not present in the last common ancestor of those groups. The cladistic term for the same phenomenon is homoplasy.
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