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.

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.

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 17QP: Analysis of X-Linked Dominant and Recessive Traits A young boy is color-blind. His one brother and...

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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?
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.
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
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.
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.
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
One type of colorblindness is an X-linked recessive trait. If a colorblind man and a woman with normal vision but whose father was colorblind have a girl, what is the probability she will be colorblind? If they have a boy what is the probability he will be colorblind? 1/2 for the girl; 1/4 for the boy O 1/2 for the girl; 100% for the boy O 1/2 for the girl; 1/2 for the boy 1/4 for the girl; 1/2 for the boy O for the girl; 1/2 for the boy
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
Which of the following disorders in humans has an X-linked recessive inheritance pattern? Red-green color blindness Marfan syndrome Tay-Sachs disease Hutchinson-Gilford progeria
Which of the following is the most likely description of the trait in the following family tree? X-linked Recessive X-linked Dominant Y-linked Autosomal Dominant Autosomal Recessive
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
Red-green colorblindness in humans is recessive and x-linked. if a woman, heterozygous for colorblindness marries a colorblind man, what is the probability that they will have colorblind daughter? How would you distinguish a trait caused by a sex-linked recessive allele from one caused by a sex-influenced gene that is dominant?