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- Sexual reproduction is when two morphologically distinct animals fuse together and produce an offspring. The fusing involves a female's egg and the male's sperm.

- In order to perform sexual reproduction, both males and females need to find a mate. To find a mate, the organism would need to perform different efforts to get the attention of the mate. This can involve fighting or dancing.

- The human reproduction allows the child to get 23 chromosomes from the father and 23 chromosomes from the mother. This is because a human body contains 46 chromosomes and they are split during the meiosis. ¨

- A disability in the meiosis state is the world-leading cause of miscarriages.

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Arise in the genome of an organism and change the nucleotide sequence.

There are three types of mutations

Deletion

Removal of nucleotides

Insertion

Addition of nucleotides

Chromosomal aberration

Damage to DNA (X-rays, radiation)

Substitution

Nucleotides get substituted For others

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Key mechanism in evolution
The change of heritable traits (mutations) in a population over time.
These Variations occur randomly because of mutations. Some animals with these Variations become more successful than the ones without these traits and get to reproduce more often and efficiently. After some time the whole populations will posses these traits, this is called natural selection.

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Random Orientation of Homogenous Chromosomes In Metaphase 1 of Meiosis 1 

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Random Orientation of Homogenous Chromosomes In Metaphase 1 of Meiosis 1 

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In Meiosis, I members of homologous pairs separate during anaphase. The separation of the chromosomes is random so the genes that are added to the mate's genes are not specified.