Biology Answers

 Indicate whether to cross (i) mutant females with wild-type males, or (ii) mutant males with wild-type females, or (iii) both (i.e. reciprocal crosses), to produce an F1 generation that will enable you to determine if the traits are dominant or recessive, and if they are sex-linked (on the X chromosome). Draw mating diagrams and Punnett squares to support your answer.

To determine whether the mutant genes are independent or linked, a testcross is more appropriate than using data from the F2 generation. Knowing which are the recessive genes, indicate which individuals you would mate in this testcross. Draw a mating diagram & use the forked line method to predict the outcome of this cross.

Conduct the appropriate testcross using Drosophila Lab, record your results and indicate whether the three mutant genes are inherited independently or whether they are linked? Include a chi square analysis to support your conclusion.

Why are the epidermal cells in leaves flat?

Why does the rate at which oxygen leave the blood cell change?

assess the protein content of each of the six food groups

Two populations of birds live in same habitat both eat insects how is it possible that the two populations do not compete for food

Describe the pathway of the electrical impulse from the central nervous system to the contraction of a muscle.

Hydrogen bonds are formed when

• Research the strengths and weaknesses, advantages and disadvantages of genetic technologies (DNA extraction, DNA amplification, gel electrophoresis, and transformation of cells) to speculate, in an informed manner, about specific future uses of generic engineering technologies. Your counterarguments must include discussion of the reliability and validity of the use of the technologies.

• You must accurately reference your sources.

• Explain and analyse, in an illustrated report, the current uses and relevance of genetic engineering technologies (DNA extraction, DNA amplification, gel electrophoresis, and transformation of cells) in industry and medicine. You should include the scientific principles behind each technology.

Using real-life examples, include reasons for carrying out each technology and the benefits to the relevant sector, including an appraisal of efficacy and cost

Hi, in green colourblindness, is it true or false that they can’t distinguish red dots against green backgrounds