Paper 1 · Genetics and Inheritance
Down's syndrome is caused by
Acarcinogens.
Bradiation.
Cgene mutation.
Dchromosome mutation.
ZIMSEC Biology 4025/1 Paper 1, November 2018, Q27
Paper 1 · Genetics and Inheritance
ZIMSEC Biology 4025/1 Paper 1, November 2018, Q27