Skip to content
Philoid
Browse Saved
Back to chapter
Biology
4. Heredity and Evolution
Home · Class 10 · Biology · Ref. Book · 4. Heredity and Evolution
Prev
Next
Q8 of 167 Page 191

Which of the two, sperm or ovum, decides the sex of the child?

Sperm decides the sex of the child. During fertilization if X of the sperm fertilizes with egg (having one X chromosome) a girl child is born; if Y of the sperm fertilizes with egg a boy child is born.


More from this chapter

All 167 →
6

Some plants occur in one of the two sizes: tall or dwarf. This characteristic is controlled by one pair of genes. Tallness is dominant to dwarfness. Choose suitable letters for this gene pair.

7

What are the chromosomes XY and XX known as?

9

State whether the following statement is true or false:

10

A new born child has an XY pair of chromosomes. Will it be a baby boy or a baby girl?

Questions · 167
4. Heredity and Evolution
1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 20 21 22 22 23 24 25 25 26 27 27 27 28 28 29 30 31 32 33 33 34 34 35 35 35 36 36 36 37 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 30 31 32 33 34 34 35 36 36 37 37 38 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70
Back to chapter
About Contact Privacy Terms
Philoid · 2026
  • Home
  • Search
  • Browse
  • Quiz
  • Saved