BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 14, Problem 5SA
Summary Introduction
Introduction:
The dominant allele masks the expression of the recessive allele. Therefore the dominant allele is expressed in homozygous and heterozygous genotype while the recessive
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A man and woman are both of normal pigmentation, but both have one parent who is albino (without melanin pigmentation). Albinism is an autosomal (not sex-linked) recessive trait. What is the probability that their first child will be an albino?
A.
0%
B.
1/8
C.
¼
D.
½
E.
100%.
What is the probability of a child having a recessive disorder if both parents are heterozygous carriers?
A. 1/2
B. 1/4
C. 3/4
D. 2/3
E. Zero
Two parents without cystic fibrosis have a child with cystic fibrosis. The allele for cystic fibrosis is therefore _________ to the non-disease allele
Group of answer choices
A. codominant
B. recessive
C. dominant
D. epistatic
E. incompletely dominant
Chapter 14 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 14 - Constructing a family pedigree is particularly...Ch. 14 - Prob. 2SACh. 14 - Prob. 3SACh. 14 - Prob. 4SACh. 14 - Prob. 5SACh. 14 - A trait that is present in a male child but not in...Ch. 14 - Color blindness is a case of ________ inheritance....Ch. 14 - Prob. 8SACh. 14 - Alleles for Tay-Sachs disease are inherited in an...Ch. 14 - Prob. 10SA
Ch. 14 - Prob. 11SACh. 14 - Prob. 12SACh. 14 - Prob. 13SACh. 14 - Klinefelter syndrome XXY can be easily diagnosed...Ch. 14 - Match the chromosome terms appropriately. ___...Ch. 14 - Does the phenotype indicated by the red circles...Ch. 14 - Human females have two X chromosomes XX; males...Ch. 14 - Somatic cells of individuals with Down syndrome...Ch. 14 - An allele responsible for Marfan syndrome Section...Ch. 14 - Both Duchenne muscular dystrophy and color...
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- If two parents are heterozygous for a genetically inherited dominant trait, what is the probability that they will have a child together who has this trait in his or her phenotype? a. 25% b. 50% c. 75% d. 100%arrow_forwardPolydactyly is a congenital physical anomaly in in humans, dogs, cats; and having supernumerary fingers or toes. If it is an autosomal dominant trait, when is a genotype of a person that shows normal phenotype? a. heterozygous recessive b. heterozygous dominant c. homozygous recessive d. homozygous dominantarrow_forwardA trait that is present in a male child but not in either of his parents is characteristic of inheritance. a. autosomal dominant b. autosomal recessive c. X-linked recessive d. It is impossible to answer this question without more informationarrow_forward
- When a trait is only expressed in the presence of two identical alleles, the genotype is Select one: a. Heterozygous dominant b. Heterozygous recessive c. Homozygous dominant d. Homozygous recessivearrow_forwardThe flower color gene studied by Mendel affected three traits. This is an example of ________. a. pleiotropic genes b. codominant inheritance c. polygenic inheritancearrow_forwardWhich of the following does not describe the pedigree analysis ofan autosomal dominant disorder?a. heterozygotes are affectedb. two affected parents will always have affected childrenc. affected children usually have an affected parentd. two unaffected parents will not have affected childrenarrow_forward
- Assume that attached earlobes is an autosomal recessive trait with 47% penetrance. If one parent is heterozygous (Aa) and the other homozygous recessive (aa) for the attached earlobe gene, what is the probability that their first child will have attached earlobes? Show calculations please! a. 50%b. 11.75%c. 25%d. 23.5%e. 74%arrow_forwardChoose the MOST LIKELY inheritance pattern for the trait shown in the pedigree. a. Sex-linked dominant b. Autosomal recessive c. Sex-linked recessive d. Autosomal Dominantarrow_forwardAssume that attached earlobes is an autosomal recessive trait with 47% penetrance. If one parent is heterozygous (Aa) and the other homozygous recessive (aa) for the attached earlobe gene, what is the probability that their first child will have attached earlobes? Show your calculation, with labels. a. 50%b. 11.75% c. 25%d. 23.5% e. 75%arrow_forward
- Blue eyes and a straight hairline are both recessive alleles for two different genes. The dominant phenotypes of the two different genes are brown eyes and a widow’s peak. a male with blue eyes and a widow’s peak, and a female with brown eyes and a straight hairline, have a child What is the probability will have blue eyes and a straight hairline? A. 1/2 B. 1/4 C. 1/8 D. 1/16arrow_forwardPlease help with the following: ____ is an example of an autosomal dominant inherited diseases. A. Cystic Fibrosis B. Breast Cancer C. Sickle-cell disease D. Tay-Sachs Disease E. Hutchinson-Guilford Progeria Syndromearrow_forwardColor blindness is an x-linked recessive disorder. A woman who is a carrier for color blindness has children with a man who is color blind. Determine the probability that their child will be color blind. a. 0 % b. 25% c. 50% d. 100%arrow_forward
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