Loose-leaf Version for What is Life? A Guide to Biology
3rd Edition
ISBN: 9781464172274
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 7, Problem 6SA
Summary Introduction
To analyses:
What percentage of gametes will carry an allele in an individual homozygous for a trait?
Introduction:
Homozygous traits are those which have only one version of an allele for that trait. This means it will be either a dominant allele or a recessive allele.
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Chapter 7 Solutions
Loose-leaf Version for What is Life? A Guide to Biology
Ch. 7 - Prob. 1SACh. 7 - Prob. 2SACh. 7 - Prob. 3SACh. 7 - Prob. 4SACh. 7 - Prob. 5SACh. 7 - Prob. 6SACh. 7 - Prob. 7SACh. 7 - Prob. 8SACh. 7 - Prob. 9SACh. 7 - Prob. 10SA
Ch. 7 - Prob. 11SACh. 7 - Prob. 12SACh. 7 - Prob. 13SACh. 7 - Prob. 14SACh. 7 - Prob. 15SACh. 7 - Prob. 1MCCh. 7 - Prob. 2MCCh. 7 - Prob. 3MCCh. 7 - Prob. 4MCCh. 7 - Prob. 5MCCh. 7 - Prob. 6MCCh. 7 - Prob. 7MCCh. 7 - Prob. 8MCCh. 7 - Prob. 9MCCh. 7 - Prob. 10MCCh. 7 - Prob. 11MCCh. 7 - Prob. 12MCCh. 7 - Prob. 13MCCh. 7 - Prob. 14MCCh. 7 - Prob. 15MCCh. 7 - Prob. 16MC
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- 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?arrow_forwardA boy with cystic fibrosis (a recessive disorder) is born to a couple who appear to be normal. What are the chance (percent or ratio) that any other children born to this couple will also have cystic fibrosis?arrow_forwardIn humans, the alleles for unattached earlobes is dominant over the allele for attached earlobes. The allele for dark hair dominates the allele for light hair. If both parents are heterozygous for earlobe attachment and hair color, what types of offspring can they produce, and what is the probability for each type?arrow_forward
- Red-green colour blindness is a sex-linked trait. Red-green colour blindness (Xrg) is the inability to distinguish between red and green colours. The Xrg allele is recessive to the normal X-linked allele. A normal woman has a father who has red-green colour blindness. She had a child with a man who does not have red-green colour blindness. What is the probability they will have a son with red-green colour blindness? Select one: a. 0 b. 0.13 c. 0.25 d. 0.50arrow_forwardRed-green colour blindness is a sex-linked trait. Red-green colour blindness (Xrg) is the inability to distinguish between red and green colours. The Xrg allele is recessive to the normal X-linked allele.A normal woman has a father who has red-green colour blindness. She had a child with a man who does not have red-green colour blindness.What is the probability they will have a son with red-green colour blindness? Select one: a. 0 b. 0.13 c. 0.25 d. 0.50arrow_forwardHemophilia is a disease caused by a recessive allele (h), which is found on the X chromosome, non-hemophilia is (H). A normal man marries a woman that is heterozygous for the trait. Give the genotypes and phenotypes of all possible offspring?arrow_forward
- Huntington's disease is characterized by a late onset of nerve degeneration that leads to death. The allele that causes the disease is dominant. Lucille is homozygous dominant for the disease and Joe is homozygous recessive. What is the probability that their children will have Huntington's disease? 0% 1/4 or 25% 2/4 or 50% 3/4 or 75% 4/4 or 100%arrow_forwardFree earlobes are dominant to attached earlobes. Two heterozygous individuals plan to have 5 children. What is the probability that the couple has at least 1 child with attached earlobes?arrow_forwardYour significant other is a big fan of hamsters due to their appearance and you eventually gift them two hamsters that are curly (C) brown (B) that you got from the local pet store. Weeks later your significant called you that the hamsters have an offspring that is curly white (b) and straight (c) brown. You are astonished and start to think what the probability was to have a curly white hamster?arrow_forward
- chin fissure is a dominant trait controlled by a single gene. If a man (homozygous dominant) with chin fissure married to a woman (heterozygous dominant)with a chin fissure too, what is the probability that they will have a child without chin fissure?aid your answer with an illustrationarrow_forwardIn 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?arrow_forwardDoing genetic analysis it is determined that two parents are heterozygous for two separate unlinked recessive traits (i.e., both parents are heterozygous for both loci). Given this genetic information, what is the probability of their having a child which is homozygous recessive for both traits?arrow_forward
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