The Xb locus on Alouatta genus, the howler monkey X chromosome has 2 alleles, b+ and b. The b+ allele causes the presence of the Xb surface protein on their granulocyte cells, while the recessive allele b which does not allow the antigen to appear. The Xb locus is at 15 centimorgans, from the GRG locus. The GRG locus produces a normal enzyme activity. Individual howler monkeys with one form of an eye condition have the grg/grg genotype, with the males grg/Y presenting the condition. A male howler monkey with the eye condition caused by this enzyme mutation and no Xb antigen has a normal female howler monkey daughter with Xb antigen. This howler monkey female daughter is expecting a little howler monkey from the mating from a male howler monkey from a different tree. A) Determine the genotype of the howler monkey daughter, from the problem. B) Determine the types and percentages of each gametes in oogenesis produced of the howler monkey daughter female, based on the map distance given. C) If this female howler monkey has a male-young, what is the probability the he will lack the Xb antigen and have this eye disease?

The Xb locus on Alouatta genus, the howler monkey X chromosome has 2 alleles, b+ and b. The b+ allele causes the presence of the Xb surface protein on their granulocyte cells, while the recessive allele b which does not allow the antigen to appear. The Xb locus is at 15 centimorgans, from the GRG locus. The GRG locus produces a normal enzyme activity. Individual howler monkeys with one form of an eye condition have the grg/grg genotype, with the males grg/Y presenting the condition. A male howler monkey with the eye condition caused by this enzyme mutation and no Xb antigen has a normal female howler monkey daughter with Xb antigen. This howler monkey female daughter is expecting a little howler monkey from the mating from a male howler monkey from a different tree. A) Determine the genotype of the howler monkey daughter, from the problem. B) Determine the types and percentages of each gametes in oogenesis produced of the howler monkey daughter female, based on the map distance given. C) If this female howler monkey has a male-young, what is the probability the he will lack the Xb antigen and have this eye disease?

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter7: Development And Sex Determination

Section: Chapter Questions

Problem 18QP: Equalizing the Expression of X Chromosome Genes in Males and Females Males have only one X...

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