BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 10.7, Problem 2MC
Summary Introduction
To determine:
The reason for males and females to differently express recessive X-linked alleles.
Introduction:
The sex of an individual can be determined by the absence or presence of Y-chromosome. Females inherit X chromosomes from each parent, while males inherit X chromosome from mother and Y chromosome from father. Therefore, the genotype of females is XX and the genotype of males is XY.
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Students have asked these similar questions
Which of the following statements about X-linked recessive inheritance is true?
X-linked recessive traits appear more frequently in females than males.
X-linked traits are only found in humans.
Females who are carriers of an X-linked recessive trait may not exhibit any phenotypic effects.
Males have two allele copies of X-linked genes.
How does the pedigree of an autosomal recessive trait differ from the pedigree of an X-linked recessive trait?
With respect to the inheritance of X-linked recessive traits, which of the following is
true?
OA mother cannot transmit the recessive allele to her daughter.
OA mother cannot transmit the recessive allele to her son.
CA father with the trait can pass the trait to his sons.
OA father with the recessive allele passes it to all of his daughters.
A man with the recessive allele may not express the trait.
Chapter 10 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 10.1 - How are chromosomes, DNA, genes, and alleles...Ch. 10.1 - Prob. 2MCCh. 10.2 - Why did Gregor Mendel choose pea plants as his...Ch. 10.2 - Distinguish between dominant and recessive;...Ch. 10.3 - Prob. 1MCCh. 10.3 - How are Punnett squares helpful in following the...Ch. 10.3 - Prob. 3MCCh. 10.3 - Prob. 4MCCh. 10.4 - What is a dihybrid cross, and what is the...Ch. 10.4 - Prob. 2MC
Ch. 10.4 - Prob. 3MCCh. 10.5 - How do the patterns of inheritance differ for...Ch. 10.5 - What is the difference between recombinant and...Ch. 10.5 - Prob. 3MCCh. 10.6 - Prob. 1MCCh. 10.6 - What is pleiotropy?Ch. 10.6 - Prob. 3MCCh. 10.6 - Prob. 4MCCh. 10.7 - Prob. 1MCCh. 10.7 - Prob. 2MCCh. 10.7 - Prob. 3MCCh. 10.8 - How are pedigrees helpful in determining a...Ch. 10.8 - Prob. 2MCCh. 10.9 - Prob. 1MCCh. 10.9 - Prob. 2MCCh. 10 - In the list of four terms below, which term is the...Ch. 10 - Prob. 2MCQCh. 10 - Prob. 3MCQCh. 10 - Prob. 4MCQCh. 10 - Prob. 5MCQCh. 10 - Prob. 6MCQCh. 10 - Prob. 1WIOCh. 10 - List three genes mentioned in this chapter or not...Ch. 10 - Prob. 3WIOCh. 10 - Prob. 4WIOCh. 10 - Prob. 5WIOCh. 10 - Explain how each of the following appears to...Ch. 10 - Prob. 8WIOCh. 10 - Calico cats have large patches of orange and...Ch. 10 - Prob. 10WIOCh. 10 - Review Burning Question 10.10, which describes the...Ch. 10 - Prob. 1PITCh. 10 - Analyze the concept map and then explain the...Ch. 10 - Add meiosis, gametes, mutations, incomplete...Ch. 10 - In rose bushes, red flowers FF or Ff are dominant...Ch. 10 - In Mexican hairless dogs, a dominant allele...Ch. 10 - Prob. 3GPCh. 10 - Two lizards have green skin and large dewlaps...Ch. 10 - A fern with a genotype AA Bb Cc dd Ee mates with...Ch. 10 - In Fraggles, males are genotype XY and females are...
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- Which of the following statements about X-linked recessive patterns is true? The X-linked trait appears more often in females than in males. An affected father can never pass an X-linked recessive allele to an XY son. An affected father can never pass an X-linked recessive allele to a daughter. Heterozygous females always express the X-linked recessive trait.arrow_forwardOne type of colorblindness is an X-linked recessive trait. If a colorblind man and a woman with normal vision but whose father was colorblind have a girl, what is the probability she will be colorblind? If they have a boy what is the probability he will be colorblind? 1/2 for the girl; 1/4 for the boy O 1/2 for the girl; 100% for the boy O 1/2 for the girl; 1/2 for the boy 1/4 for the girl; 1/2 for the boy O for the girl; 1/2 for the boyarrow_forwardDoes X-linked recessive "fit" this pedigree? How about autosomal recessive? What about X-linked dominant? Autosomal dominant? yes This pedigree shows inheritance of a DOMINANT trait: Is it X-linked or autosomal? Why? Fill in everyone's genotype.arrow_forward
- What is a Barr body? How many Barr bodies in a person with genotype XXXXX? How is the structure of a Barr body different from that of other chromosomes in the cell? How does the structure of a Barr body affect gene expression? Color-blindness is an X-linked recessive trait. Heterozygous females are not color blind but they can sometimes have partial color blindness. Explain how this can occur.arrow_forwardWhat 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?arrow_forwardHaemophilia 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 ( COarrow_forward
- Red-green colorblindness is inherited in an X-linked recessive pattern in humans. A colorblind man and a woman with normal vision have four children, and one of them is a colorblind male. Does the mother have to be a carrier in this case? (Yes or No) What is the probability of the next child in this family being both colorblind and male? No, 25% Yes, 25% No, 50% Yes, 50%arrow_forwardWhy are some alleles dominant and some recessive?arrow_forwardWhat do the terms genotype, phenotype, dominant, recessive, homozygous, and heterozygous mean?arrow_forward
- Hemophilia is an X-linked recessive disease. A hemophilic man marries a woman who is not a carrier of the disease. (a) Draw a Punnett square showing the genotypes of their children. (b) What are the chances that their daughters will be carriers of the disease? (c) What percentage of their children are likely to have the disease?arrow_forwardRed-green color blindness is an X-linked recessive disorder. A woman with normal vision whose father was colorblind has children with a man with normal color vision. What is the probability that their first child will be colorblind? A) 1/4 B) 1/2 C) 3/4 D) 0 E) 1arrow_forwardIn humans, blue eyes are inherited as a recessive autosomal trait and color blindness is an X-linked recessive trait. A woman with blue eyes and normal color vision (her father was colorblind) marries a man who has normal color vision. The man has brown eyes, but his mother had blue eyes. What is the probability that this couple will have a child with normal vision and blue eyes?arrow_forward
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