CAIE A-Level Biology A2 16.1.8 Random Fertilisation and Variation Questions
Explain random fertilisation and its contribution to variation using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- A2
Exam points
- Explain random fertilisation and its contribution to variation.
CAIE A-Level Biology A2 16.1.8 Random Fertilisation and Variation Questions question 1
[Maximum number: 2]
M. musculus produces gametes by meiosis. These gametes are genetically different.
There is random fusion of gametes at fertilisation.
Explain how the random fusion of gametes leads to the expression of rare, recessive alleles.
1 (by chance) both gametes (may) have recessive allele ;
2 zygote / offspring, has, pair / two / homozygous, recessive alleles ;
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