2. Achondroplasia is a form of dwarfism caused by a dominant allele. The homozygous dominant genotype causes prenatal death, so individuals who have this condition are all heterozygotes. In the questions below, show how you came to your answer. a) If a person with achondroplasia mates with a person of average height who does not have achondroplasia, what percentage of their children would be expected to be of average height? b) If two persons with achondroplasia have children, what percentage of their children would be expected to have achondroplasia?

2. Achondroplasia is a form of dwarfism caused by a dominant allele. The homozygous dominant genotype causes prenatal death, so individuals who have this condition are all heterozygotes. In the questions below, show how you came to your answer. a) If a person with achondroplasia mates with a person of average height who does not have achondroplasia, what percentage of their children would be expected to be of average height? b) If two persons with achondroplasia have children, what percentage of their children would be expected to have achondroplasia?

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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4. A man and woman marry and have 3 children. When the man is 50 years old, he is diagnosed with Huntington's disease (which is inherited dominantly). The woman is tested and she does not carry the gene. What is the chance for each child to have Huntington's disease? Are the 3 events (the children having HD) independent or mutually exclusive? What are the chances that all three children are HD free? If one of the three children marries a person with no family history of HD (assume normal), what is the chance that their child will have the disease? (we do not know yet if the parent has it or not)
1. An albino man whose parents are both normal marries a woman one of whose parents is normal and the other albino. She has an albino sister. The couple has a normal son. a. Is albinism a dominant or a recessive trait? Explain your answer. b. Give the genotypes of all the persons involved. c.The couple plans to have more kids. What is the probability of their second child being normal?
8. Albinism in humans is heritable condition resulting in the inability to produce the pigment melanin, which is responsible for hair, eye and skin coloration. The allele for the albino condition is recessive to the allele for melanin production. What is the probability of two heterozygous parents producing a family of two normal children and one albino child?
5. Rather than studying you are watching Maury. A couple comes on with a baby. The father has brown eyes, his parents, grandparents, sister, and brothers all have brown eyes. The mother has blue eyes and the baby has blue eyes. The brown eye allele is dominant to blue eye allele. Using this information, answer the following questions. Co What is the likely genotype of the father? What is the genotype of the mother? What is the genotype of the child? Refi
Hemophilia, disease in which the blood lacks a clotting factor, is caused by an X linked recessive gene. Joe doe not have hemophilia and Lucille is heterozygous for the condition. What is the chance that their MALE child will have hemophilia? (Note: you are calculating the probability for their MALE children only, in other words if they have 1 male child, what is the probability that he will be born with the disease?) 0% 1/4 or 25% 2/4 or 50% 3/4 or 75% 4/4 or 100%
5. Sickle cell disease is inherited in an autosomal recessive manner. If Josh and Katie each have a sibling with sickle cell disease, but neither Josh nor Katie nor any of their parents have the disease, then what is the chance that a child of Josh and Katie's will have sickle cell disease? (Hint: First determine the chance that Josh and Katie are carriers of the disease.)
Explain this to me…..
Mendelian Genetics Worksheet Name Hour Fill in the Punnett squares for each cross given to determine the phenotype and genotype ratio's of the offspring Crosses with one homozygous dominant parent: AA x AA A AA x Aa A АА х а A AA x aa A A A A A a A a a Offspring Genotypes: AA AA AA Aa Offspring Phenotypes: Aa Aa aa aa aa Dominant Dominant Recessive Dominant Recessive Recessive_ _ Crosses with one heterozygous parent: Aа х АА Аа х Аа Аа х аа A a A a A a A a A a a Offspring Genotypes: AA_ Aa_ aa AA Aa aa AA_ Aa aa Offspring Phenotypes: Dominant Recessive Dominant Dominant Recessive Recessive _ Crosses with one homozygous recessive parent: aa x AA aa x Aa аа х аа a a a a a a A A a A a a Offspring Genotypes: AA Aa_aa AALAA_aa AA Aa_ aa_ Offspring Phenotypes: Dominant Dominant Dominant Recessive_ Recessive_ Recessive _
2. Brown eyes are dominant over blue eyes in humans. Having a peaked hairline is dominant over having a smooth hairline in humans. Two such humans decide to have offspring – who will also be human, because you know – genes. One of the parents has blue eyes and is heterozygous for a peaked hairline. The other parent is brown-eyed with a peaked hairline but is heterozygous for both traits. a) Complete a Punnett square showing all possible genotypes of their offspring. b) What is the probability of this couple producing a child with blue eyes? c) What is the probability of producing a child who has both brown eyes and a smooth hairline?
4. Mr. Salazar has Type A blood while Mrs. Salazar has Type B. They have four children. Bobbie has Type A, Gabbie has Type B, Alex has Type AB, and Teddie has Type O. What are the genotypes of all six people in this family? NOTE: The ABO blood type gene has three alleles. IA and IB are codominant; i (for Type O) is recessive to both.
7. Hereditary ichthyosis in humans is a sex-linked trait. If a normal male and a carrier female produce offspring, what will be the phenotypic ratios of: Normal females to scaly females? Normal males to scaly males? 8. Raedwald is color blind. His four sisters and his parents all have normal color vision. Who passed this condition on to Raedwald, and what can be said for certain about the genotypes of his maternal and paternal grandparents? wwwwM