Human Anatomy & Physiology (2nd Edition)
2nd Edition
ISBN: 9780134553511
Author: Erin C. Amerman
Publisher: PEARSON
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Chapter 27, Problem 3AYKA
Summary Introduction
To review:
The probability of a couple having a child with widow’s peak.
Introduction:
A widow’s peak is a V-shaped site seen in the hairline in the middle of the forehead. The growth of hair is observed in the forehead region, which is suppressed in the bilateral pair of the periorbital fields. This trait is known to be genetic.
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Assume for a moment that a child has a autosomal recessive disorder, but both parents appear normal. What is the genotype of both parents?
: one parent must be homozygous dominant
: both parents must be homozygous recessive
: both parents are heterozygous
: both parents nust be homozygous dominant
An Autosomal Dominant trait is only evident in the homozygous state.
True
False
Differentiate the following.
Sex-linked inheritance
Sex-limited inheritance
Sex-influenced inheritance
Chapter 27 Solutions
Human Anatomy & Physiology (2nd Edition)
Ch. 27.1 - What are the three major periods of prenatal...Ch. 27.1 - 2. When does the postnatal period of life begin?
Ch. 27.2 - Prob. 1QCCh. 27.2 - What are the steps of fertilization?Ch. 27.2 - 3. What is the function of cleavage of the...Ch. 27.2 - How does a morula differ from a blastocyst?Ch. 27.2 - 5. What is the ultimate fate of the inner cell...Ch. 27.2 - 6. Which cell type secretes hCG?
Ch. 27.2 - 7. What are the functions of amniotic fluid?
Ch. 27.2 - 8. What are the main functions of each of the...
Ch. 27.3 - Prob. 1QCCh. 27.3 - 2. Which cells form the three germ layers?
Ch. 27.3 - 3. What are the two types of embryonic folding?...Ch. 27.3 - What is the first major event that occurs during...Ch. 27.3 - Prob. 5QCCh. 27.4 - Prob. 1QCCh. 27.4 - Prob. 2QCCh. 27.4 - What specific changes occur in each month of fetal...Ch. 27.4 - Prob. 4QCCh. 27.5 - Prob. 1QCCh. 27.5 - Prob. 2QCCh. 27.5 - Which hormone stimulates the beginning of...Ch. 27.5 - Prob. 4QCCh. 27.6 - What are the criteria used to determine a newborns...Ch. 27.6 - Prob. 2QCCh. 27.6 - 3. Explain what happens to each structure in the...Ch. 27.6 - Prob. 4QCCh. 27.6 - What role do hormones play in the let-down reflex...Ch. 27.7 - What is the genome? How many chromosomes are in...Ch. 27.7 - Prob. 2QCCh. 27.7 - 3. How does a genotype differ from a phenotype?
Ch. 27.7 - Prob. 4QCCh. 27.7 - Prob. 5QCCh. 27.7 - 6. What is an X-linked disorder? How can a female...Ch. 27 - Match the correct time period of gestation with...Ch. 27 - Prob. 2CYRCh. 27 - Mark the following statements about fertilization...Ch. 27 - Prob. 4CYRCh. 27 - Number the sequence of events in fertilization....Ch. 27 - Prob. 6CYRCh. 27 - Match the extraembryonic membrane with the correct...Ch. 27 - Prob. 8CYRCh. 27 - Match the structures of the embryo with the...Ch. 27 - What are the two types of embryonic folding?Ch. 27 - Prob. 11CYRCh. 27 - Prob. 12CYRCh. 27 - Prob. 13CYRCh. 27 - Prob. 14CYRCh. 27 - Prob. 15CYRCh. 27 - Prob. 16CYRCh. 27 - 17. Fill in the blanks: The first ____________...Ch. 27 - Prob. 18CYRCh. 27 - Prob. 19CYRCh. 27 - Which pattern of inheritance includes examples of...Ch. 27 - Prob. 1CYUCh. 27 - Why is the single-celled zygote approximately the...Ch. 27 - Prob. 3CYUCh. 27 - Prob. 4CYUCh. 27 - Prob. 1AYKACh. 27 - Prob. 2AYKACh. 27 - Prob. 3AYKACh. 27 - Prob. 4AYKACh. 27 - Prob. 5AYKB
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- Sickle cell anemia is inherited as an autosomal recessive condition. It also exhibits incomplete dominance in that the heterozygous genotype displays a mild form of the disease known as sickle cell trait while individuals with the homozygous recessive genotype have a severe form of SCA. A man who has severe sickle cell anemia marries a woman who suffers from a mild trait. What is the probabilitu they will have a child with severe SCA?What is the probability they will have a child with mild SCA? What is the probability they will have a normal child? Show ALL work using punnett squares.arrow_forwardA male with autosomal dominant brown hair and a female with unknown hair color have 3 sons with recessive blonde hair. What is the male’s genotype? What are the possible genotype(s) and phenotype(s) [hair color] of the female?arrow_forwardA man with hemophilia (a recessive, sex-linkedcondition) has a daughter without the condition.She marries a man who does not have hemophilia.What is the probability that their daughter willhave hemophilia? Their son? If they have foursons, what is the probability that all will be affected?arrow_forward
- A woman with normal blood clotting mates with a man who has hemophilia. Their first child is a boy who has hemophilia. Tests show that the father and son both have the same form of hemophilia, that it is X-linked recessive, and that the boy has normal genetic inheritance. You can predict that if the couple produces more children together, then the odds are that: Select one: O a. All of the children will have hemophilia. b. Half of the boys and half of the girls will have hemophilia. O C. None of the rest of the children should have hemophilia. O d. Half of the boys and none of the girls will have hemophilia.arrow_forwardIn man, Huntington’s Chorea is autosomal dominant progressive brain disorder and often lethal (H), the individuals usually dying in middle age. Red-green color blindness is recessive and sex-linked (X c ). A double heterozygous woman marries a heterozygous Huntington’s Chorea colorblind man. What are the genotypes of the man and woman? What are the genotypes and phenotypes of the all the remaining offspring after all deaths caused by Huntington’s Chorea? Show COMPLETE cross. TIP: cancel out gametes with Harrow_forwardHemophilia is an X-linked recessive disorder and blood type is autosomal. If two healthy parents, one of which is blood type A and the other blood type B, produce a son who has hemophilia and is type O, what is the probability that their next child will be a son with hemophilia and blood type B? 1/2 3/16 1/4 1/8 1/16arrow_forward
- If both parents are carriers for an autosomal recessive disorder (i.e. both Aa) and they have 2 children, what is the probability that both will be affected by the disorder? (Give your answer to 4 decimal places)"arrow_forwardDefine incomplete dominance. Describe autosomal dominant and autosomal recessive disorder with ONE example.arrow_forwardWhat is the probability that they will have a baby boy with brown eyes and cleft chin Parents Genotype : Bb/bb – Eye Color - (brown eyes dominant , blue eyes recessive) Dd- Dimples ( dominant) Cc/cc- Cleft chin (Dominant) Sarah BbDdcc James bbDdCcarrow_forward
- Demonstrate how males are at an increased risk of sex-linked recessive traits by crossing a female who is a carrier for Hunter syndrome with a normal male. The genotypes involved are XH, Xh, and Y. State the genotypes and phenotypes of the offspring.arrow_forwardParents Genotype : Bb/bb – Eye Color - (brown eyes dominant , blue eyes recessive) Dd- Dimples ( dominant) Cc/cc- Cleft chin (Dominant) Sarah BbDdcc James bbDdCc What is the probability that Sarah and James will have a baby girl with blue eyes and dimplesarrow_forwardState the probability of a male child being affected and ofa female child being affected if the mother carries a genefor a sex-linked recessive disorder. What if it is the fatherwho carries the gene?arrow_forward
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