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Title: Genetics-polygenic traits last questions for today Post by: Aliya1 on Apr 25, 2018 #41. Use the following information to answer the next question.
The Labrador Retriever’s coat colours are black, yellow, and chocolate. Yellow is produced by the presence of a recessive epistatic gene, which has the effect of masking the black and chocolate colour genes. Black (B) is dominant to chocolate (b). Therefore, the possible genotypes and corresponding phenotypes are: Phenotype Possible Genotypes Black G__B__ Brown G__bb Yellow gg__ Predict the percentage of offspring that would be black in colour for each of the following crosses. Record your answer as a whole number. Cross: GgBbcross x GgBB GGBbcross xGGBb Percentage of Offspring: #42. Below is a simplified chart for polygenic trait of eye colour. The amount of melanin in the iris is what determines the colour of the eye. People with brown eyes have more melanin in their iris than people with blue eyes. The amount of melanin is controlled by how many dominant alleles a person has for eye colour as follows: Number of Dominant Alleles Genotypes Phenotypes 4 AABB Very dark brown eyes 3 AaBB or AABb Brown eyes 2 AaBb, aaBB etc. Light brown or hazel eyes 1 Aabb or aaBb Dark blue eyes 0 aabb Light blue eyes Which of the following parental crosses explains how two brown-eyed parents can produce a blue-eyed child? Select one: a. Aabb cross times AABB b. AaBB cross times AaBb c. AABB cross times AaBb d. AaBB cross times AABb Thank you so much for your help bio_man. Have a good afternoon :) Title: Re: Genetics-polygenic traits last questions for today Post by: bio_man on Apr 25, 2018 Content hidden
Title: Re: Genetics-polygenic traits last questions for today Post by: bio_man on Apr 25, 2018 #41. Use the following information to answer the next question. The Labrador Retriever’s coat colours are black, yellow, and chocolate. Yellow is produced by the presence of a recessive epistatic gene, which has the effect of masking the black and chocolate colour genes. Black (B) is dominant to chocolate (b). Therefore, the possible genotypes and corresponding phenotypes are: Phenotype Possible Genotypes Black G__B__ Brown G__bb Yellow gg__ Predict the percentage of offspring that would be black in colour for each of the following crosses. Record your answer as a whole number. Cross: GgBbcross x GgBB GGBbcross xGGBb Percentage of Offspring: Is this part of another question? It doesn't mention the allele G but I remember reading about it. Get back to me... Also, when's it due? Title: Re: Genetics-polygenic traits last questions for today Post by: Aliya1 on Apr 25, 2018 Hi, sorry for the confusing. The information given in question 41 is only for Question 41. This assignment is due tomorrow at 11:59 pm. Thank you for all of your help with all of the questions i have asked for. For the answer you gave for question #42. I also think it's b as well
If you can get back with me today, that would be good. But if you can't then tomorrow is also fine i have to hand in my assignment tomorrow night before 11:59 pm |