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

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter14: Chromosomes And Human Inheritance

Section: Chapter Questions

Problem 3GP: Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With...

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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?
Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?
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, 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). 1:1 € 1:1 1:1 orange-haired females : 1:1 orange-haired male : 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). 1:1 blue-haired females :…
Chickens, like all birds, have ZZ-ZW sex determination. The bar-feathered phenotype in chickens results from a Z-linked allele that is dominant over the allele for nonbar feathers. A barred female is crossed with a nonbarred male. The F1 from this cross are intercrossed to produce the F2. What will the phenotypes andtheir proportions be in the F1 and F2 progeny?
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?
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.
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.
: In Drosophila, yellow body is due to an X-linked gene that is recessive to the gene forgray body.(a) A homozygous gray female is crossed with a yellow male. The F1 are intercrossed toproduce F2. Give the genotypes and phenotypes, along with the expected proportions, of theF1 and F2 progeny.(b) A yellow female is crossed with a gray male. The F1 are intercrossed to produce the F2.Give the genotypes and phenotypes, along with the expected proportions, of the F1 and F2progeny.(c) A yellow female is crossed with a gray male. The F1 females are backcrossed with graymales. Give the genotypes and phenotypes, along with the expected proportions, of the F2progeny.(d) If the F2 flies in part b mate randomly, what are the expected phenotypic proportions offlies in the F3??
An allele in Drosophila produces a “star-eye” trait in the heterozygousindividual. (It is not X-linked.) However, the star-eye allele is lethal in homozygotes. What would be the ratio and phenotypesof surviving flies if star-eyed flies were crossed to each other?
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?
. Consider the imaginary trait, bristles with split-ends, a trait hypothesized to be X-linked dominant. In a cross, the P1 virgin females were homozygous wild type while the males had bristles with split-ends. The F1 84 males were all wild type while the 90 females all had split-ends. In addition, the data for the F2 generation revealed 26 wild type males, 35 wild type females, 29 split-end males and 40 split-end females. Is this what is to be expected? Use chi-square to prove your position.