Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 14, Problem 9SQ
Summary Introduction
Introduction: Tay-Sachs disease is caused due to the mutations in HEXA gene that encodes for lysozymal enzyme. It follows autosomal recessive inheritance, that is, two copies of mutated gene should be present for the occurrence of the disease.
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Biology
When both parents are heterozygous carriers of the recessive allele that causes albinism, what percentage of their offspring will be heterozygous carriers of the albinism allele?
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A: 25%
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A) A woman with type O blood is expecting a child. Her husband is type A and her husband's parents both had type AB blood. What will be their child’s blood type?
2.
A)A woman with type O blood is expecting a child. Her husband is type A and her husband's parents both had type AB blood. What will be their child’s blood type?
B) A couple has one child with type AB blood. If one parent is heterozygous for blood type A and the other parent is homozygous for their blood type, what are the chances of their future children having: Type A blood? Type B blood? Type AB blood? O blood?
a. Is the trait indicated by the solid symbols inherited in a dominant or recessive manner? (2)
b. Give a definitive reason for your answer in (a). (This reason should not be skips a generation or doesn’t skip a generation).
c. Assign genotypes for individuals III-3 in both pedigrees.
Chapter 14 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 14 - Constructing a pedigree is particularly useful...Ch. 14 - Prob. 2SQCh. 14 - Prob. 3SQCh. 14 - Prob. 4SQCh. 14 - Prob. 5SQCh. 14 - A trait that is present in a male child but not in...Ch. 14 - Color blindness is a case of ______ inheritance....Ch. 14 - A female child inherits one X chromosome from her...Ch. 14 - Prob. 1DAACh. 14 - Prob. 2DAA
Ch. 14 - Prob. 3DAACh. 14 - Prob. 9SQCh. 14 - Expression of the SRY gene on the Y chromosome...Ch. 14 - Prob. 11SQCh. 14 - Prob. 12SQCh. 14 - Prob. 13SQCh. 14 - Prob. 14SQCh. 14 - Match the chromosome terms appropriately. ____...Ch. 14 - Prob. 1GPCh. 14 - Does the phenotype indicated by the red circles...Ch. 14 - Human females have two X chromosomes (XX); males...Ch. 14 - A mutated allele responsible for Marfan syndrome...Ch. 14 - The somatic cells of most individuals with Down...Ch. 14 - Mutations in the genes for clotting factor VIII...
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- Alleles for Tay-Sachs disease are inherited in an autosomal recessive pattern. Why would two parents with a normal phenotype have a child with Tay-Sachs? a. Both parents are homozygous for a Tay-Sachs allele. b. Both parents are heterozygous for a Tay-Sachs allele. c. New mutations gave rise to Tay-Sachs in the child. d. b or carrow_forwardIn genetics, F stands for filial, which means ________. a. friendly c. final b. offspring d. hairlikearrow_forwardwhen else do we see a non-Mendelian pattern of inheritance? a)When genes are located on different chromosomes b)When genes are located far away on the same chromosome c)When genes are located close together on the same chromosomearrow_forward
- Use the pedigree to answer the question. What is Ann’s genotype for this trait? A. She must be AA. B. She must be Aa. C. She can be either aa or AA. D. She can either be AA or Aa.arrow_forwardWhich blood allele is recessive? A B AB Oarrow_forwardWhat is Polygenic Inheritance? A) When one gene has many effects B) The additive effect of 2 or more genes C) The genes that cause skin colorarrow_forward
- Gregor mendels experiments sought to discover if he could find the rules that govern A. Genetics B. Heredity C. Meiosis D. Mutationsarrow_forwardHow is this trait inherited? A. The trait is epistatic. B. The trait is X-linked. C. The trait is dominant. D. The trait is recessive.arrow_forwardUse the pedigree to answer the question. What is Sandra’s genotype for this trait? A. She must be AA. B. She must be Aa. C. She can be either aa or AA. D. She can either be AA or Aa.arrow_forward
- A cross between a horse homozygous for red hair and a horse homozygous for white hair results in offspring with the coat colour called roan. When you look at the fur of the roan offspring you see both red and white hairs. What type of inheritance best explains this? a) blending inheritance b)codominance c)incomplete codominance d)multiple allelesarrow_forwardWhich phenomenon explains differences in the inheritance patterns of the appearance of a chin beard between males and females of certain species of goats, even when their genotypes are the same? A) sex-limited trait B) sex-influenced trait C) incomplete penetrance D) variable expressivity E) lethal allelearrow_forwardThe next pedigree shows how the ABO blood type is being passed on from parents to offspring. Use that pedigree to answer the questions below. How many generations are there? ____________ Can you tell if the trait is dominant or recessive? Why or why not? ________________________________________________________________ Determine the genotypes of all individuals in the pedigree below. Use the following format for the genotypes.arrow_forward
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