B13 - Reproduction 

Task 1b: Listen to the podcast to get an overview of this topic:

Task 2b: Make notes that:

• Define variation and explain why it is important

• Describe the process of asexual and sexual reproduction

• Give the advantages and disadvantages of asexual reproduction

• Give the advantages and disadvantages of sexual reproduction

• Describe the process of mitosis

• Describe the process of meiosis

• Compare meiosis and mitosis

• Define gamete, haploid and diploid

• Give the number of chromosomes in a human cell

Task 2c: Answer the exam questions and self mark

Task 7b: Make notes that:

• Define allele, heterozygous, homozygous, genotype, phenotype, dominant allele and recessive allele

• Describe how to construct a punnett square to predict the results of a genetic cross

Task 7c: Complete the examples on the worksheet and self mark using slide 31

Task 8b: Make notes that:

• State the sex chromosomes for males and females

• Draw a punnett square to show the probability of male/female children

• Describe why family trees are useful 

Task 8c: Answer the exam questions and self mark

Task 9b: Make notes that:

• Describe polydactyly and state whether it is caused by a dominant or recessive allele (watch the video to help)

• Complete the tasks on slide 11

• Describe cystic fibrosis and state whether it is caused by a dominant or recessive allele - the information in the video will help

Task 9c:

• Draw a genetic diagram using two heterozygous (for CF) parents. 

• Work out the the % chance that their child will have CF.

Task 10b: Make notes that:

• Describe the processes of chorionic villus sampling and amniocentesis

• List the advantages and disadvantages of embryo screening

Task 10c: Answer the exam questions and self mark

Complete the quiz for your set to make sure you understand this unit.

Extension Task:  Apply your new knowledge to some past paper questions:

GCSE Biology:  Medium  Hard

Trilogy:  Easy  Medium  Hard