Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 10.1, Problem 1CSC
Summary Introduction
To determine: Alleles that are packed in sperm and egg of parents to produce diverse children.
Introduction: Genes are the units of heredity that has coded genetic information inside the chromosomes in the form of
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Albinism is a recessive trait in humans.A geneticist studies a series of families in which both parents have normal pigmentation and at least one child has albinism. The geneticist reasons that both parents in these families must be heterozygotes and that albinism should appear in 14 of their children. To his surprise, the geneticist finds that the frequency of albinism among the children of these families is significantly greater than 14. Can you think of an explanation for the higher-than-expected frequency of albinism among these families?
Certainly, not all Muppets look like the one shown in the picture below, nor do they all look the same. In fact, there’s a great deal of phenotypic variation in Muppets. Two traits that have been particularly well-studied are curly hair presences and skin color.
One individual is a male, and he possesses a green skin and no hair, whereas the female individual possess a curly hair and pink skin. Let’s call the gene controlling skin coloration S and that controlling hair H. In this species, both hair and green skin are recessive traits. Both of the individuals shown are homozygous.
1.
What is the genotypes of
Miss Piggy:
2. Kermit's Genotype:
3. If these two lovebirds (er, love-muppets?) mated, what would their offspring look like? Describe all phenotype combinations possible and the ratios in which they would occur?
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?
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Chapter 10 Solutions
Biology
Ch. 10.1 - Prob. 1CSCCh. 10.1 - Prob. 1CYLCh. 10.1 - Prob. 2CYLCh. 10.1 - Prob. 3CYLCh. 10.2 - What would be the consequences for the resulting...Ch. 10.2 - What would be the genetic consequences for the...Ch. 10.2 - Prob. 1CSCCh. 10.2 - describe the steps and outcome of meiotic cell...Ch. 10.2 - Prob. 2CYLCh. 10.3 - explain how meiosis and sexual reproduction...
Ch. 10.4 - Prob. 1HYEWCh. 10.4 - Prob. 1CYLCh. 10.4 - describe some of the human genetic disorders that...Ch. 10.4 - Prob. 1TCCh. 10 - Prob. 1MCCh. 10 - Prob. 2MCCh. 10 - Prob. 3MCCh. 10 - Prob. 4MCCh. 10 - Prob. 5MCCh. 10 - Meiotic cell division produces ________ (how many)...Ch. 10 - During ___________ of meiosis 1, paired homologous...Ch. 10 - Prob. 3FIBCh. 10 - Prob. 4FIBCh. 10 - Prob. 5FIBCh. 10 - Prob. 1RQCh. 10 - Prob. 2RQCh. 10 - Prob. 3RQCh. 10 - Describe how meiosis provides for genetic...Ch. 10 - Define nondisjunction, and describe common...Ch. 10 - Many plants car. reproduce sexually or asexually....
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- The zebra fish is a very popular aquarium pet fish that is known to be hardy, attractive, and able to survive well in groups. Wild type zebra fish have blue–purple horizontal stripes that run from gill to tail, with a silver–gold body. An alternative form of the zebra fish results from a mutation that causes a homozygous recessive red-colour fish. Could you kindly answer all of the questions? It's multiple choice so minimal explanation is needed and i do not have a lot of questions left. Thank you. a) If 32 of 84 zebra fish have the recessive phenotype of red colour, what is the frequency of the recessive allele in this population of fish? a. 0.62 b. 0.38 c. 0.14 d. 0.79 b) What percentage of the population of zebra fish are heterozygous? a. 47% b. 38% c. 62% d. 53% c)How many zebra fish are purebreeding for the blue–purple horizontal stripes? a. 72 b. 12 c. 52 d. 5 d) If 15 years ago, 34 of 88 zebra fish had the red colour, has microevolution occurred? Why or why not?…arrow_forwardAlbinism is a recessive trait in humans . A geneticist studies a series of families in which both parents havenormal pigmentation and at least one child has albinism. The geneticist reasons that both parents in these families must be heterozygotes and that albinism should appear in 14 of their children. To his surprise, the geneticist finds that the frequency of albinism among the children of these families is significantly greater than 14. Can you think of an explanation for the higher-than-expected frequency of albinism among these families?arrow_forwardIchthyosis is a rare X-linked recessive disorder that is characterized by scaling of the skin around the neck and lower extremities. A young couple, Bart and Jenny, are expecting a child and are aware there might be a chance that their child could be affected by this disorder. Jenny (the wife) has ichthyosis, but Bart (her husband) is unaffected and completely normal with respect to the allele responsible for this disorder. Both Bart and Jenny were Biology majors as undergraduates. Knowing a little about the pattern of X-linked recessive inheritance, Bart and Jenny were concerned when ultrasound revealed that they would be having a son. However, genetic testing performed on the baby shortly after birth revealed that their newborn son, Mark, did not have ichthyosis. If non-disjunction occurred, assume it happened in only one of the two parents, and during only one of the two meiotic divisions. Let’s assume that non-disjunction of the sex chromosomes occurred during only one meiotic…arrow_forward
- Tay-Sachs is a recessive lethal disease in which there is neurological deterioration early in life. This disease is rare in the population overall but is found at relatively high frequency in Ashkenazi Jews from Eastern Europe. A woman has a maternal uncle who had the disease. Her father does not come from a high-risk population. Her husband’s sister died of the disease at an early age. Draw the pedigree of the individuals described. Include the genotypes where possible.arrow_forwardInterested in exploring the genetic pathways that lead to neurological issues, you want to see if recessive mutations which generate too many neurons (tm) in flies - which many causes autistic like symptoms are in the same gene as mutations that generate too few neurons (tf) - intellectual diabilities. You cross a true-breeding homozygous tm/tm fly to a homozygous too few neuron fly tf/tf. What phenotype in the progeny would tell these mutations are in different genes?arrow_forwarda geneticist has obtained 2 true-breeding strains of mice, each homozygous for an independently discovered recessive mutation that prevents the formationof hair on the body. one mutant strain is called naked, and the other is hairless. to determine whether the 2 mutations are alleles, the geneticist crosses naked and hairless mice with each other. All the offspring lack hair on their bodies. A: are naked and hairless mutations 2 different alleles? yes or no B: what type of experiment is this calledarrow_forward
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