Genetics Answers

In squash plants, yellow fruit (Y) is dominant to white fruit (y). If two plants heterozygous for yellow fruit are crossed, what are the possible genotypes of the offspring?

Over several years, the owner of a palomino stud bred it with a palomino mare.  Of the many offspring produced, some appeared like their parents but others appeared chestnut and others still, cremello.  Explain how this is possible and use a Punnett square to support your answer

In pea plants, purple flowers are dominant to white flowers. If two white flowers are crossed what percentage of their offspring will aslo be white?

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.

Do you think more genetic variation would help a species survive, or do you think less genetic variation would help a species survive? Why?  

 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.

• 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

Why is there uncertainty in breeding plants with a dominant allele?

Only 2 men could possible be my daughters dad. One guys mom have a crooked pointer pinky. And so does my daughter same hand same pinky. Does that mean my daughter is part of the family whos finger is crooked?