Class 10 Botany simulations · Heredity

Sex determination and X-linked traits

Pick parents for an X-linked recessive trait (haemophilia or colour blindness) and see the chances for sons and daughters.

Open the simulation

What to notice

A carrier mother passes the allele to half her sons (affected) and half her daughters (carriers).

Key relation

XX × XY → ½ daughters, ½ sons ; sons get their X from the mother

Try this

What happens with a normal mother and an affected father?

What you can change

• Mother: choose Normal (XX), Carrier (XXᶜ), Affected (XᶜXᶜ)
• Father: choose Normal (XY), Affected (XᶜY)
• Trait: choose Haemophilia, Colour blindness

More in Heredity

• Dihybrid cross: independent assortment
• Mendel’s monohybrid cross
• Natural selection on a trait

See all Class 10 Botany simulations or every Physica simulation.