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Sex determination is based on particular...

Sex determination is based on particular chromosomes in both birds and humans. State two points of difference between their mechanisms of sex determination.

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i. In birds female has dissimilar chromosomes (ZW) and male has two similar ZZ chromosomes. But in humans female has XX (homogametic) and male has XY (heterogametic)
ii . In humans the sperm is responsible for the sex of child but in birds egg is responsible for the sex of the chicks.
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