Heredity · आनुवंशिकता
Why were all F1 plants tall? Mendel, genes and XX/XY.
Heredity games
Heredity · आनुवंशिकता
Mendel crossed pure tall (TT) and dwarf (tt) pea plants:
| T | t | |
|---|---|---|
| T | TT (tall) | Tt (tall) |
| t | Tt (tall) | tt (dwarf) |
F1: all Tt (tall). F2 (Tt × Tt): 3 tall : 1 dwarf; genotypes 1 TT : 2 Tt : 1 tt. Dihybrid F2: 9 : 3 : 3 : 1.
Sex determination: women XX, men XY. The child is a boy if the sperm carries Y.
For Class 10 (NCERT Science 10, “Heredity”; the evolution part was dropped from the book in 2023).
A one-page chart to stick on the wall, and a worksheet to practise.
Heredity
F1 all tall · F2 3:1 · dihybrid 9:3:3:1 · XX/XY
kheloaurseekho.in — free charts, games and worksheets
Heredity — worksheet
Name: ____________________ Class: ______ Date: __________
1. Make a Punnett square for Tt × Tt.
2. How is the sex of a child decided?
3. Differentiate inherited and acquired traits.
kheloaurseekho.in — free charts, games and worksheets
