Explain why you think particular genes are linked or epistasis.
Explain why you think particular genes are linked or epistasis.
Homework Answers
When genes are close together on the same chromosome, they are said to be linked, crossing over still occurs but the gamete types produced is different. Instead of assorting independently, the genes tend to stick together during meiosis that is the alleles of the genes that are already together on a chromosome will tend to be passed as a unit to gametes. Epistasis occurs when the expression of one gene is directly influenced by another gene. Interaction between alleles at different genes can result in epistasis.
When genes are found on different chromosomes or far apart on the same chromosome, they assort independently and are said to be unlinked.
Epistasis and extensions of basic heredity 1. What is the difference between two genes affecting a...
Epistasis and extensions of basic heredity 1. What is the difference between two genes affecting a single character and epistasis? What is special about epistasis? 2. How can we use the genotypic abbreviations of phenotype (shorthand gentotypes) (e.g., 9A_B_, 3A_bb, 3aa3_, laabb) to understand what is happening in epistasis? 3. For the example of the Y allele in mice (from the text), explain why yellow coat coloration is ominant, but lethality is recessive. You may use figures to support your...
1. What is the difference between two genes affecting a single character and epistasis? What is...
1. What is the difference between two genes affecting a single character and epistasis? What is special about epistasis? 2. How can we use the genotypic abbreviations of phenotype (shorthand gentotypes) (e.g., 9A_B_, 3A_bb, 3aaB_, laabb) to understand what is happening in epistasis? 3. For the example of the Y allele in mice (from the text), explain why yellow coat coloration is dominant, but lethality is recessive. You may use figures to support your argument.
In a paragraph or two, explain how Thomas Morgan discovered sex-linked genes, linked genes and "crossing...
In a paragraph or two, explain how Thomas Morgan discovered sex-linked genes, linked genes and "crossing over" in chromosomes. Provide experimental evidence in your answer.
Please help #2! Genetics !! You cross two bunnies which were heterozygous for the two genes...
Please help #2! Genetics !!
You cross two bunnies which were heterozygous for the two genes that control bunny color, BbHh, and you obtain the following progeny: 9 brown bunnies, 3 yellow bunnies, and white bunnies. You think that this result indicates that bunny color is controlled by epistasis. What is epistasis and how would it give these results? In humans, color blindness X^b, is an X-linked recessive trait. A woman that is heterozygous for normal vision marries a color...
Why is possible for two very closely linked genes to be transduced together in the same...
Why is possible for two very closely linked genes to be transduced together in the same donor phage, but it is not possible for two genes that are far apart to be transduced together?
Which of the following statements is false? Epistasis involves interactions among different genes, to influence phenotype....
Which of the following statements is false? Epistasis involves interactions among different genes, to influence phenotype. When an allele is dominant, the heterozygous combination is the same phenotypically as one of the homozygotes. Dominance refers to the form of expression of a gene in relation to its allele (or alleles). Epistasis involves interactions between alleles of a single gene.
Explain why linkage measurements are more accurate for two genes that are close together than two...
Explain why linkage measurements are more accurate for two genes that are close together than two genes that are farther apart. Why are genes more than 50cM away from each other considered “unlinked?” If two genes are 75cM away from each other, they are not genetically linked, so how do we even know that they are 75cM away from each other?
2. Two particular genes are linked and 14 map units apart. A GBIGB individual is mated...
2. Two particular genes are linked and 14 map units apart. A GBIGB individual is mated with a gblgb individual. a) Show the genotype of an FI offspring demonstrating linkage. b) What gametes can the Fl produce AND in what frequency? If the F1 generation mate amongst themselves, what is the frequency of GGbh F2 offspring? (show your work) c)
1. Why is it difficult to accurately measure long map distances by RF for linked genes?...
1. Why is it difficult to accurately measure long map distances by RF for linked genes? What can be done for more accurate measurements of long map distances?
In the following cross (P generation) the genes are inherited independently (not linked) except for genes...
In the following cross (P generation) the genes are inherited independently (not linked) except for genes G and H, which are completely linked and show no recombination: EEffggHH x eeFFGGhh 1. what would be the genotype of their offspring (F1)? 2. what type of gametes (genotypes) could their offspring produce? how many types of gametes would you expect if all four genes assorted independently?
Epistasis and extensions of basic heredity 1. What is the difference between two genes affecting a single character and epistasis? What is special about epistasis? 2. How can we use the genotypic abbreviations of phenotype (shorthand gentotypes) (e.g., 9A_B_, 3A_bb, 3aa3_, laabb) to understand what is happening in epistasis? 3. For the example of the Y allele in mice (from the text), explain why yellow coat coloration is ominant, but lethality is recessive. You may use figures to support your...
1. What is the difference between two genes affecting a single character and epistasis? What is special about epistasis? 2. How can we use the genotypic abbreviations of phenotype (shorthand gentotypes) (e.g., 9A_B_, 3A_bb, 3aaB_, laabb) to understand what is happening in epistasis? 3. For the example of the Y allele in mice (from the text), explain why yellow coat coloration is dominant, but lethality is recessive. You may use figures to support your argument.
Please help #2! Genetics !!
You cross two bunnies which were heterozygous for the two genes that control bunny color, BbHh, and you obtain the following progeny: 9 brown bunnies, 3 yellow bunnies, and white bunnies. You think that this result indicates that bunny color is controlled by epistasis. What is epistasis and how would it give these results? In humans, color blindness X^b, is an X-linked recessive trait. A woman that is heterozygous for normal vision marries a color...
Which of the following statements is false? Epistasis involves interactions among different genes, to influence phenotype. When an allele is dominant, the heterozygous combination is the same phenotypically as one of the homozygotes. Dominance refers to the form of expression of a gene in relation to its allele (or alleles). Epistasis involves interactions between alleles of a single gene.
2. Two particular genes are linked and 14 map units apart. A GBIGB individual is mated with a gblgb individual. a) Show the genotype of an FI offspring demonstrating linkage. b) What gametes can the Fl produce AND in what frequency? If the F1 generation mate amongst themselves, what is the frequency of GGbh F2 offspring? (show your work) c)
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