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How is the sex of child determined in hu...

How is the sex of child determined in human beings?

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The sex of a human child is determined by the 23rd pair of chromosomes inherited by the child.
If the 23rd pair of chromosomes is XX, then it is a girl. If it is XY, then it is a boy. 
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ZEN PUBLICATION-HEREDITY AND EVOLUTION -ZEN ADDITIONAL QUESTIONS SECTION (LONG ANSWER (LA) TYPE QUESTIONS)
  1. How is the sex of child determined in human beings?

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  2. a] How many pairs of chromosomes are present in human beings? Out of t...

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  3. Define evolution. How does it occur? Describe how fossils provide us e...

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  4. Does geographical isolation of individuals of a species lead to format...

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  5. What is meant by speciation? List four factors that could lead to spec...

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  6. Bacteria have a simpler body plan when compared with human beings. Doe...

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  7. All human races like Africans, Asians, Europeans, Americans and others...

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  8. Differentiate between monoecious and dioecious plants. Give one exampl...

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  9. Give reasons why acquired characters are not inherited. NCERT Exemplar

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  10. Evolution has exhibited a greater stability of molecular structure whe...

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  11. In the following crosses write the characteristics of the progeny

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  12. a] Study the following cross and showing self pollination in FI, fill ...

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  13. Give the basic features of the mechanism of inheritance.

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  14. Give reasons for the appearance of new combinations of characters in...

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  15. Write the differences between homologous organs and analogous organs. ...

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  16. i] How does relative method help to determine the age of fossils? ii...

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  17. The plant bearing round yellow coloured (RrYy) seed are self pollinate...

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  18. What is evolution? Explain the three evidences for evolution.

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  19. a] How many pairs of chromosomes are present in human beings? Out of t...

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  20. Define evolution. How does it occur? Describe how fossils provide us e...

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  21. Does geographical isolation of individuals of a species lead to format...

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