Reproduction, DNA and inheritance

3 quick checks≈3% of the testCore

Reading is free. Sign in to tick off lessons, keep your place and track your mastery.

By the end you’ll be able to

Compare sexual and asexual reproduction, and explain how meiosis produces four genetically different haploid gametes and restores the chromosome number at fertilisation
Describe DNA as a polymer of two strands forming a double helix, genes as sections of DNA coding for proteins, and the genome, including the importance of the Human Genome Project

0% read

Explain the inheritance of disorders such as cystic fibrosis and polydactyly, evaluate embryo screening, and show how sex is determined by the X and Y chromosomes

(Edexcel, OCR, Cambridge) Describe the structure of DNA nucleotides and complementary base pairing; (Cambridge) sexual reproduction in flowering plants

This lesson hasn’t been written yet

Combined Science lessons are written from the official syllabus the first time a learner opens them, then saved for everyone. Sign in and this one is written for you in a minute or two. It’s free.

Sign in Create a free account