You are studying the inheritance pattern of hair color in troll dolls, which have XY sex determination. You cross a true-breeding blue-haired male with a true-breeding orange-haired female. The F1 offspring (males and females) are all orange-haired. You cross an F1 orange-haired female to an F1 orange-haired male. What phenotypic ratio would you expect if the troll doll hair gene is X-linked? Fill in each blank with a numeral (ie, O, 1, 2, 3, 4, etc). Do not include extra spaces or decimals. Use "O" if a phenotypic group would not be present. Make sure your ratio is reduced (ie, use 2:1 rather than 4:2). orange-haired females : blue-haired females : orange-haired male : blue haired males What phenotypic ratio would you expect if the troll doll hair gene is autosomal? Fill in each blank with a numeral (ie, 0, 1, 2, 3, 4, etc). Do not include extra spaces or decimals. Use "0" if a phenotypic group would not be present. Make sure your ratio is reduced (ie, use 2:1 rather than 4:2). orange-haired females : blue-haired females : orange-haired males : blue-haired males

You are studying the inheritance pattern of hair color in troll dolls, which have XY sex determination. You cross a true-breeding blue-haired male with a true-breeding orange-haired female. The F1 offspring (males and females) are all orange-haired. You cross an F1 orange-haired female to an F1 orange-haired male. What phenotypic ratio would you expect if the troll doll hair gene is X-linked? Fill in each blank with a numeral (ie, O, 1, 2, 3, 4, etc). Do not include extra spaces or decimals. Use "O" if a phenotypic group would not be present. Make sure your ratio is reduced (ie, use 2:1 rather than 4:2). orange-haired females : blue-haired females : orange-haired male : blue haired males What phenotypic ratio would you expect if the troll doll hair gene is autosomal? Fill in each blank with a numeral (ie, 0, 1, 2, 3, 4, etc). Do not include extra spaces or decimals. Use "0" if a phenotypic group would not be present. Make sure your ratio is reduced (ie, use 2:1 rather than 4:2). orange-haired females : blue-haired females : orange-haired males : blue-haired males

Name: You are studying the inheritance pattern of hair color in troll dolls
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Description: You are studying the inheritance pattern of hair color in troll dolls, which have XY sex determination.You cross a true-breeding blue-haired male with a true-breeding orange-haired female. The F1offspring (males and females) are all orange-haired. Y

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter15: Genomes And Genomics

Section: Chapter Questions

Problem 2QP: Hemophilia and color blindness are both recessive conditions caused by genes on the X chromosome. To...

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Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele?
Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross?
Hemophilia and color blindness are both recessive conditions caused by genes on the X chromosome. To calculate the recombination frequency between the two genes, you draw a large number of pedigrees that include grandfathers with both hemophilia and color blindness, their daughters (who presumably have one chromosome with two normal alleles and one chromosome with two mutant alleles), and the daughters sons. Analyzing all the pedigrees together shows that 25 grandsons have both color blindness and hemophilia, 24 have neither of the traits, 1 has color blindness only, and 1 has hemophilia only. How many centimorgans (map units) separate the hemophilia locus from the locus for color blindness?
The F1 flies described in question 1 were mated with brown-eyed flies from a true-breeding line. What phenotypes would you expect the offspring to have? (a) all with red eyes (b) all with brown eyes (c) half with red eyes and half with brown eyes (d) red-eyed females and brown-eyed males (e) brown-eyed females and red-eyed males
You are studying ear shape in dogs (with XY se x determination) and cross a true-breeding pointed-ear female to a true-breeding floppy-ear male and collect all pointy-ear male and female offspring. Your colleague suspects that the two phenotypes may be caused by alleles of one X-linked gene. What sort of cross would you do to determine whether this is an X-linked trait? Name it and describe it. What offspring phenotypic ratio would you expect in that cross if the green allele is a dominant X-linked allele? Make sure to label your ratio with all relevant phenotypes. How would the result of your cross (from A) be different if the trait is autosomal
In Drosophila, sepia colored eyes are due to a recessive allele s and red eyes are due to a dominant allele S. If females with sepia eyes are crossed with homozygous males with red eyes, what phenotypic proportions will F1 y F2 respectively?
Cinnabar eye color is a sex-linked, recessive characteristic in fruit flies. If a female having cinnabar eyes is crossed with a wild-type male, what percentage of the F1 males will have cinnabar eyes?
In rabbits, black hair is due to a dominant allele B and brown hair to its recessive allele b. Short hair (H) is dominant to long hair (h). In a cross between a homozygous black, longhaired rabbit and a brown, homozygous shorthaired one, what would the F1 generation look like? If you did not know the genotype of an F1 rabbit, you could determine its genotype by a test cross in which it is crossed with an animal with which phenotype AND genotype If you carried out this test cross, what phenotypes and in what ratio would you expect? What phenotypes in what ratio would be expected in the F2 generation?
You are studying tail length in a species of mice, where some mice have long tails and some have short tails.Preliminary results show that long tail is dominant, but you think the trait may be X-linked. Give the expectedoffspring phenotypic ratio for each cross if the trait is X- linked or if it is autosomal and answer the question atthe end. Make sure your phenotypic ratio is labeled with the complete phenotype (all relevant details). Cross #1: true-breeding long-tailed male x true-breeding short tailed female• Expectation if X-linked?• Expectation if autosomal?Cross #2: true-breeding long-tailed female x true-breeding short tailed male• Expectation if X-linked?• Expectation if autosomal?Compare the four results listed above. Briefly, why is a reciprocal cross is necessary to determine X (or Z)linkage?
Polydactylism (extra digits) is due to a dominant autosomal allele, what is the likelihood that a couple with the normal number of digits have a son with polydactylism? Flower color in snapdragons is due to a gene with incomplete dominance: CRCR plants have red flowers, CRCW have pink flowers, and CWCW plants have white flowers. Which cross is expected to yield progeny that all have pink flowers? A couple is expressing a child, the man has hemophilia (a sex-linked blood disorder due to a recessive allele) and the woman is a carrier for this disorder. If they have a daughter, what is the likelihood that she will inherit hemophilia?
In guinea pigs, rough coat (R) is dominant to smooth coat (r). If a homozygous rough-coated animal is crossed with a smooth-coated one: What will be the phenotype(s) of the F1 generation? What will be the phenotype(s) of the F2 generation? What will be the phenotype(s) of the offspring resulting from a cross of an F1 individual back to its rough parent? What will be the phenotype(s) of the offspring of a cross of an F1 individual back to its smooth parent?
In dogs, black coat color (B) is dominant to yellow coat color (b), and straight fur (C) is dominant to curly fur (c). The coat color gene and the fur texture gene are on different chromosomes, so they assort independently, and are not sex-linked. In a cross between two BbCc parents, given that an offspring has black coat color and straight fur, what's the probability that it is heterozygous for both genes? Give 2 digits past the decimals.