Biology·Development & continuity of life · NSSCO 4.4.2
Monohybrid inheritance
Narrated lesson · press play
How a single feature is passed from parents to offspring — the language of genetics, how to work out crosses with a genetic diagram to get 3:1 and 1:1 ratios, and how a baby's sex is decided.
What you'll learn in this lesson
By the end you should be able to (NSSCO Biology 4.4.2):
- Define genotype, phenotype, homozygous, heterozygous, dominant and recessive
- Calculate and predict the results of monohybrid crosses (3:1 and 1:1) using a genetic diagram
- Describe the inheritance of sex in humans (XX and XY)
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Quick revision
Revise this in 5 minutes
Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.
Hands-on lab
Run monohybrid crosses in the 3D genetics lab