DNA REPLICATION ESSAY
Described the process of DNA replication and different types of mutations that occur during this processDNA REPLICATION
❖ This process occurs during interphases
❖ Double stranded DNA molecule unwinds and unzips
❖ When weak hydrogen bonds break
❖ To form two single stands of DNA molecule
❖ Each strand is used as a template
❖ Each stand receives a complementary base pair
❖ At the end of this process two identical copies of DNA molecule are formed
❖ This process is controlled by enzymes
Mutations
❖ Gene mutations (point and frame shift)
❖ Occurs and cause changes on the sequence of DNA molecule
❖ Chromosomal aberration
❖ Occurs and cause a change in the structure of chromosome
❖ Mutations that occurs in sex cells
❖ Are passed to the subsequent generation
DNA REPLICATION
Describe the significance of DNA replication and meiosis and how the foetus is
protected and nourished in the uterus
Significance of DNA replication
❖ Allow duplication of genetic material
❖ Ensure that four haploid gametes are formed from a diploid cell
Significance of meiosis
❖ Ensure genetic variation when crossing over occur
❖ Ensure that chromosome number remains the same as in adults
❖ Produce haploid gametes are diploid chromosome pair
Protection of foetus
❖ It is surrounded by amniotic fluid
❖ Which act as shock absorber
❖ And protects it against dehydration
❖ Also protect it against temperature fluctuation
Nourishment of foetus
❖ It receives nutrients through the placenta
❖ Which are passed into foetus by means of blood
❖ These substances read the foetus via umbilical vein
Describe the significance of DNA replication and meiosis and how the foetus is
protected and nourished in the uterus
Significance of DNA replication
❖ Allow duplication of genetic material
❖ Ensure that four haploid gametes are formed from a diploid cell
Significance of meiosis
❖ Ensure genetic variation when crossing over occur
❖ Ensure that chromosome number remains the same as in adults
❖ Produce haploid gametes are diploid chromosome pair
Protection of foetus
❖ It is surrounded by amniotic fluid
❖ Which act as shock absorber
❖ And protects it against dehydration
❖ Also protect it against temperature fluctuation
Nourishment of foetus
❖ It receives nutrients through the placenta
❖ Which are passed into foetus by means of blood
❖ These substances read the foetus via umbilical vein
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