2) Two weeks ago, you crossed males with white eyes to females with red eyes. Assuming that the white eye gene is sex-linked, what will be the distribution of the eye color phenotype in the F1 generation (which you will observe today) and the F2 generation (a self-cross between two F1 individuals)? Show your work. F1: F2:

2) Two weeks ago, you crossed males with white eyes to females with red eyes. Assuming that the white eye gene is sex-linked, what will be the distribution of the eye color phenotype in the F1 generation (which you will observe today) and the F2 generation (a self-cross between two F1 individuals)? Show your work. F1: F2:

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter20: Chromosomes And Human Genetics

Section: Chapter Questions

Problem 7CT: The following pedigree shows the pattern of inheritance of red-green color blindness in a family....

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Coat color in mice is influenced by two genes, one for color (A) and one for the amount of pigment production (C). Mice with the wild type agouti coat color have a yellowish to brownish color. Mice also have a gene that determines the amount of pigment the hair produces. Mouse Coat Phenotype and Genotype Correlation Agouti coat AA, Aa Solid gray/black coat aa Pigment production CC, Cc Albinism cc Multiple crosses were made between male and female mice that were each heterozygous for both traits (AaCc). The data table shows the number of mice of each coat type. Calculate the average F1 generation coat color to answer the question. Coat Color Number of Mice Born in Each Trial Cross Mean Number of Mice 1 2 3 4 5 6 7 8 9 10 Agouti coat 11 8 9 9 10 8 10 7 10 9 Solid gray/black coat 5 2 1 3 4 3 4 3 3 2 Albinism 3 3 6 4 4 3 3 7 4 3 Which…
Let’s say we are crossing flies with a “big head” mutant trait with flies that have normal sized heads. If the mutant allele in this cross is a dominant, autosomal allele, when phenotype(s) should be present in the F1 of your cross, and what fraction of the F1 should each phenotype represent?
A man with blood type O (genotype ii) has a father with blood type A and a mother with blood type B. Is this man a legitimate child of these parents? What is a possible phenotype of an individual that results from a woman with type AB blood and a man with type B blood? Explain with diagrams.
In humans, brown eyes (B) are dominant over blue. A brown eyed man marries a blue-eyed (b) woman and they have three children two of whom are brown-eyed and one of whom is blue-eyed. if the male has brown eyes but has a blue-eyed child, what must his genotype be?
Two albino parents have four unaffected children. If albinism in the parents is given by mutations on two different genes (A and B) and complementation is observed in all four children, what are the genotypes of the parents? A. AaBb and AABB B. AABb and AaBB C. both parents are AaBb D. AAbb and BBaa
Red-green color blindness is inherited as an X-linked recessive (Xc). If a color-blind man marries a woman who is heterozygous for normal vision, what would be the expected phenotypes of their children with reference to this character? In your answer, specify in your phenotype descriptions the gender of the children. (For example, don’t just say 75% of the children would be colorblind – you would instead say 100 % of the daughters would be colorblind and 50% of the sons would be colorblind. Note that this is not a correct answer; it is just to give you an idea of how to explain the correct phenotypes of the cross.)___
1. A man and both his parents are affected with a disease. His older sister is unaffected. This man marries a woman who is also affected with this disease. Her father is affected, but her mother and younger brother are unaffected. Assume that this disease is caused by a single gene with two alleles with complete dominance. Draw the pedigree of the family above using the correct symbols and numbering. (3) What is the chance that the couple will produce an unaffected child? Please show your calculations
For an X-linked recessive disease, if an affected male is crossed with an unaffected female who is homozygous for the wild-type allele at the disease gene, then the percentage of male offspring that will be unaffected is: a) 0% b) 50% c) 100% d) 25% e) 33%
A P cross of AAbb x aaBB is performed. An F1 offspring is crossed with an individual that is aabb. Determine which two of the following are the recombinant phenotypes. 1. Recessive a, recessive b 2. Dominant A, recessive b 3. Recessive a, dominant B 4. Dominant A, dominant B
What is a reciprocal cross? Suppose that a gene is found as a wildtype (functional) allele and a recessive mutant (nonfunctional)allele. What would be the expected outcomes of reciprocal crossesif a true-breeding normal individual was crossed to a true-breedingindividual carrying the mutant allele? What would be the results ifthe gene is maternally inherited?
If two gene pairs A and a and B and b are assorting independently with A dominant to a and B dominant to b, what is the probability of obtaining: a. an AB gamete from an AaBb individual? b. an AABB zygote from an AaBb x AaBb cross? c. an aaBb offspring from an AaBB x aabb cross? d. a phenotype aB from an Aabb x aaBb cross? e. an ab gamete from an aaBB individual?
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: GgBbGgBB GGBbGGBb Percentage ofOffspring: Answer% Answer%