A woman has a rare abnormality of the eyelids called ptosis, which prevents her from opening her eyes completely. This condition is caused by a dominant allele, The woman’s father had ptosis, but her mother had normal eyelids. Her father’s mother had normal eyelids. What are the genotypes of the woman, her father, and her mother? What proportion of the woman’s children will have ptosis if she marries a man with normal eyelids?

A woman has a rare abnormality of the eyelids called ptosis, which prevents her from opening her eyes completely. This condition is caused by a dominant allele, The woman’s father had ptosis, but her mother had normal eyelids. Her father’s mother had normal eyelids. What are the genotypes of the woman, her father, and her mother? What proportion of the woman’s children will have ptosis if she marries a man with normal eyelids?

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter19: Introduction To Genetics

Section: Chapter Questions

Problem 4CT: The young woman shown at right has albinismvery pale skin, white hair, and pale blue eyes. This...

See similar textbooks

Similar questions

The young woman shown at right has albinismvery pale skin, white hair, and pale blue eyes. This phenotype is due to the absence of melanin, which imparts color to the skin, hair, and eyes. It typically is caused by a recessive allele. In the following situations, what are the probable genotypes of the father, the mother, and their children? a. Both parents have normal phenotypes; some of their children are albino and others are not. b. Both parents and all their children are albino. c. The mother is not albino, the father is albino, and one of their four children is albino.
A woman with a colorblind father marries a colorblind man. What would be all possible genotypes and phenotypes of their offspring?
Skin color in humans is determined by a polygenic inheritance system. The husband is white while the wife is of Nigerian heritage. However, their two children are all light-skinned. How were the married couples able to have light-skinned babies. Are the odds to have a light-skinned baby one in a million? What are the possible genotypes of the husband and the wife and their children.
A woman with keratosis, a skin condition caused by a rare dominant allele, marries a man with normal skin. If they have a son, what is the probability that he will have normal skin?
Colour blindness is caused by a sex-linked, recessive gene. If a woman, whose father was colour blind, marries a man with normal colour vision, what percentage of their children will be colour blind? Show using a Punnet square cross
Two healthy parents have a child who is later diagnosed with cystic fibrosis. What is the genetic term for this kind of disease? Using Mendel’s pattern, pick a letter for this gene and give the genotypes of the parents and the child. What are the odds that their next child will also have cystic fibrosis?
In humans, the allele for brown (B) eye color is dominant to the allele which causes blue (b) eyes. If a brown-eyed man, whose father had blue eyes marries a brown-eyed woman and the first baby of this couple has blue eyes, answer: What is the genotype of the man? What is the Genotype of the woman? What is the expected genotypic and phenotypic ratio among all possible children?
Albinism is a recessive disorder where there is a lack of melanin. Andrea and her husband Claude both have normal skin pigmentation. Andrea’s mother has the albino phenotype, but her father and her brother do not (normal pigmentation). Claude’s parents are both normal, but he has a sister who has the condition (is albino). Answer the following questions If Andrea and Claude are carriers for the albino allele, what is the probability that they have an albino child? If Andrea and Claude have a second child, what is the probability this child be normal (non-albino)? NOTE: Draw a punnet square or show your work.
Albinism is a recessive genetic condition in which a person lacks pigment that gives color to the skin. If the allele for albinism is represented as "a," and the functional allele is represented as "A," what will be the genotype of a person with albinism? Aa or AA Aa or aa AA aa
In humans, normal skin color (A) is dominant over albino (a). An albino man marries a normal woman whose mother was an albino and whose father has normal skin color. What is the genotype of the man and the woman? What proportion of their children would be expected to be both normal skin pigmentation and have the trait for albino?
In humans, the genetic disease cystic fibrosis is caused by a recessive allele (a). The normal (healthy) allele is dominant (A). What is the genotype of someone who has cystic fibrosis? What are the two different genotypes that a healthy person could have? If two people were both heterozygous for the cystic fibrosis gene, what fraction of their children would be likely to have this disease? Hint: Draw a Punnett square to figure it out.
A color-blind man has a son with a color-blind female. Will their son be colorblind? What is a chance that their son will not be colorblind? % Please explain: