Which of the following statements about X-linked recessive inheritance is true? X-linked recessive traits appear more frequently in females than males. X-linked traits are only found in humans. Females who are carriers of an X-linked recessive trait may not exhibit any phenotypic effects. Males have two allele copies of X-linked genes.

Which of the following statements about X-linked recessive inheritance is true? X-linked recessive traits appear more frequently in females than males. X-linked traits are only found in humans. Females who are carriers of an X-linked recessive trait may not exhibit any phenotypic effects. Males have two allele copies of X-linked genes.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter4: Pedigree Analysis In Human Genetics

Section: Chapter Questions

Problem 22QP: Analysis of X-Linked Dominant and Recessive Traits In the eighteenth century, a young boy with a...

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Analysis of X-Linked Dominant and Recessive Traits A young boy is color-blind. His one brother and five sisters are not. The boy has three maternal uncles and four maternal aunts. None of his uncles children or grandchildren is color-blind. One of the maternal aunts married a color-blind man, and half of her children, both male and female, are color-blind. The other aunts married men who have normal color vision. All their daughters have normal vision, but half of their sons are color-blind. a. Which of the boys four grandparents transmitted the gene for color blindness? b. Are any of the boys aunts or uncles color-blind? c. Is either of the boys parents color-blind?
Analysis of X-Linked Dominant and Recessive Traits In the eighteenth century, a young boy with a skin condition known as ichthyosis hystrix gravior was identified. The phenotype of this disorder includes thickening of skin and the formation of loose spines that are sloughed off periodically. This man married and had six sons, all of whom had the same condition. He also had several daughters, all of whom were unaffected. In all succeeding generations, the condition was passed on from father to son. What can you theorize about the location of the gene that causes ichthyosis hystrix gravior?
With respect to the inheritance of X-linked recessive traits, which of the following is true? OA mother cannot transmit the recessive allele to her daughter. OA mother cannot transmit the recessive allele to her son. CA father with the trait can pass the trait to his sons. OA father with the recessive allele passes it to all of his daughters. A man with the recessive allele may not express the trait.
Which of the following statements about X-linked recessive patterns is true? The X-linked trait appears more often in females than in males. An affected father can never pass an X-linked recessive allele to an XY son. An affected father can never pass an X-linked recessive allele to a daughter. Heterozygous females always express the X-linked recessive trait.
A mother is a carrier of a recessive X-linked disorder. What are the chances of her offspring being afflicted by this disorder assuming a healthy father? 100% chance for male offspring; ~0% chance for female offspring 50% chance for male offspring; ~0% chance for female offspring 0% chance for male offspring; ~0% chance for female offspring 25% chance for male offspring; ~25% chance for female offspring 50% chance for male offspring; ~50% chance for female offspring
In humans, an X-linked disorder called coloboma iridia (a fissure in the iris_ is a recessive trait. A normal couple has an afflicted daughter. What would be the most plausible scenario for this situation? the female is not the biological mother, but the male is the biological father the father carries one recessive allele, and the mother carries one recessive allele the mother carries two recessive alleles the male is not the biological father, but the female is the biological mother both parents are heterozygous for the trait
If a trait is X-linked, which of the following statements is true? Two recessive alleles are needed to express that trait. A female with one recessive allele will express that trait. A female can be a carrier, affected or unaffected. The trait is inherited from father to son. The gene is carried on the Y chromosome.
In humans, the ABO blood type is under the control of autosomal multiple alleles. Color blindness is a recessive X-linked trait. If two parents who are both type A and have normal vision produce a son who is color-blind and is type O, what is the probability that their next child will be a female who has normal vision and is type O?
If a father is affected by an X-linked dominant condition and the mother is normal, what is the probability of their children being affected? All sons will be affected. Half of the sons will be affected. All daughters will be affected. Half of the daughters will be carriers.
In humans, the ABO blood type is under the control of autosomal multiple alleles. Color blindness is a recessive X-linked trait. If two parents who are both type A and have normal vision produce a son who is color blind and is type O, what is the probability that their next child will be a female who has normal vision and is type O?
Haemophilia is an X-linked recessive disorder. If a woman is a carrier for haemophilia and has a child with a man who does not have haemophila, what is the probability of them having a child who has haemophilia? 75% of their children will have haemophilia. 25% of their children will have haemophilia. 100 % of their children will have haemophilia. 50% of their children will have haemophilia. 82% C F5 F4 F6 F7 F8 F9 F10 F11 * 4. 7 V 8 A 9 R Y JG YHIJ-K L/ * CO ( CO
Color-blindness is an X-linked recessive disorder. Under what circumstances will this condition manifest in a child? Top of Form If the child is a male and its mother has the recessive allele If the child is a female and its father has the recessive allele If the child is a female and its mother has the recessive allele If the child is a male and its father has the recessive allele