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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3.
What is nondisjunction? Why does it cause chromosomal abnormalities? What is aneulploidy? Trisomy? Monosomy? Which kind of monosomy always results in miscarriage in early pregnancy? What do these terms mean: genotype, phenotype, allele, homozygous, heterozygous? Be able to recognize single gene inheritance patterns [autosomal dominant, autosomal recessive, X linked recessive] from a pedigree. Also, how are simple Mendelian traits transmitted? What genotype produces the phenotype? Why do some inheritance patterns result in many more males than females showing the phenotype? What inheritance patterns do Huntington disease and sickle cell anemia, and hemophilia follow (autosomal dominant or autosomal recessive, or X-linked recessive)? What are some of the symptoms of these diseases?
1. An albino man whose parents are both normal marries a woman ome 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 genotypes of all the persons involved. C.The couple plans to have more kids. What is the probability of their second child being normal
1. Huntington’s disease is a dominant trait inheritance in humans. What is/are the possible genotype/s of the mother if her husband does not exhibit the disease, but their children unfortunately got the disease? A. hh only B. HH only C. HH or Hh D. Hh only 2. Huntington’s disease is a dominant trait inheritance in humans. What is/are the possible genotype/s of the children if both parents do not exhibit Huntington’s disease? A. Hh only B. hh only C. HH or Hh D. HH only 3. Huntington’s disease is a dominant trait inheritance in humans. What is the probability of having a normal child if the mother does not have the disease while her husband has the disease? A. 0% or 50% B. 100% C. 25% D. 0% or 25% E. 50% 4. Huntington’s disease is a dominant trait inheritance in humans. What is the probability of having a girl child with Huntington’s disease if both mother and father has the heterozygous genotype for the disease? A. 0% B. 50% C. 75%…
4. Brown eyes are dominant over blue eyes. This is NOT a sex-linked trait. Cross a brown-eyed colorblind male (whose mother had blue eyes) with a normal blue-eyed female (whose father was colorblind). a) What is the genotype of the male? b) What is the genotype of the female? c) What is the probability of getting offspring that are blue-eyed carrier females? (Remember that a carrier is a female that carries one copy of the sex-linked allele, but does not have the disease.) d) What is the probability of getting offspring that are blue-eyed? e) What is the probability of getting offspring that are blue-eyed colorblind males? f) What is the probability of getting offspring that are brown-eyed carrier females? g) What is the probability of getting offspring that are blue-eyed normal males? h) What is the probability of getting offspring that are colorblind?
6. A woman and a man, both with normal clotting blood, have a son who has hemophilia. Both of their daughtersare normal. (Note: Assume all possibilities in the children are represented.)a. What pattern of inheritance is this?b. What is the genotypes of the parents?c. If they decide to have another child, what is the chance it will be a boy who has hemophilia? A girl whohas hemophilia?
4. Marfan syndrome is a genetic trait caused by in a dominant allele. The trait causes a weakening of the aorta that can be fatal. A teenager whose mother has the syndrome (but whose maternal grandfather was not affected), and whose father was unaffected, is concerend that she may have the trait. a. What is the phenotype of each of her parents? Genotype? b. What is the chance that the teenager has Marfan syndrome?
1. An albino man whose parents are both normal marries a woman one 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 genotypes of all the persons involved. c. The couple plans to have more kids. What is the probability of their second child being normal?
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
1. Hemophilia is a blood clotting disorder. It is a X linked recessive trait. A female with hemophilia mates with a non-hemophiliac male. What is the likelihood that they produce a hemophiliac child? 1. 0% 2. 25% 3. 50% 4. 75% 5. 100%
1)Explain the differences between the following terms:-Gene, allele, and locus-Genotype versus phenotype- Dominant versus recessive
2. A dark-eyed man mates with a light-eyed woman and they have ten dark-eyed children. a. What is the dominant allele? b. What is the genotype of all light-eyed people? c. What are the genotypes of the two parents? and d. What is the genotype difference between the dark-eyed parent and the dark-eyed offspring? Parent: Offspring: e. When two heterozygous dark-eyed people (Dd) are crossed, what is the phenotype ratio of dark-eyed offspring to light-eyed offspring? (Use the Punnett Square to get your answer.)