Genetics Answers

1a. Discuss the role of Gene Flow in evolution

1b. Explain how Natural Selection operates to bring about evolutionary change

1c. Explain the attributes of the Biological Species that ensure that different species do not interbreed.

Can gametes be a parent cell or a parental generation?

Evaluate how the behaviour of the chromosomes leads to variation in detail

A man and a woman who are both heterozygous for blood group A decide to produce four children.

a. What are the possible phenotypes of these children?

b. What are the possible genotypes of these children?

c. What are the chances that all four children will be blood group A?

d. What are the chances that two children will be A and two children will be type O?

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Evaluate the significance of chromosomal behaviour during cell division. Provide justified arguments for and against the behaviour of independent assortment and crossing over leading to variation within an organism.

discuss the behaviour of the chromosomes during mitosis and meiosis in each stage of cell division, including the similarities and differences between plant and animal cells. Ensure you cover: 

• Mitosis - interphase, prophase, metaphase, anaphase, telophase

• Meiosis - interphase, prophase I, metaphase I, anaphase I, telophase I, cytokinesis, interkinesis, prophase II, metaphase II, anaphase II, telophase II, cytokinesis

Explain in detail how and why the structure of the human chromosome relates to the function. Your explanations must include: 

• centromere 

• chromatids

• autosomes

• sex chromosomes

• chromosome number

• homologous

• non-homologous chromosomes

Evaluate the significance of chromosomal behaviour during cell division. Provide justified arguments for and against the behaviour of independent assortment and crossing over leading to variation within an organism.

discuss the behaviour of the chromosomes during mitosis and meiosis in each stage of cell division, including the similarities and differences between plant and animal cells. Ensure you cover: 

• Mitosis - interphase, prophase, metaphase, anaphase, telophase

• Meiosis - interphase, prophase I, metaphase I, anaphase I, telophase I, cytokinesis, interkinesis, prophase II, metaphase II, anaphase II, telophase II, cytokinesis