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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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
Transcribed Image Text:38. Color blindness is a sex-linked recessive trait in humans. A woman who is a carrier for color blindnesS
has children with a man who is color blind. Which of the following is true regarding their offspring?
A. All sons are carriers.
B. All sons are color blind.
C. No daughters are color bl":...
D. Any daughter is either color blind or a carrier
39. Predict what will be the possible phenotypic outcomes of an organism who is heterozygous
for tallness (Tt) mated with a recessive (tt) individual?
A. 3 tall offspring
B. 4 tall offspring
C. 4 dwarfs' offspring
D.2 tall, 2 dwarfs' offspring
40. Which of the following is the major cause of wildlife depletion?
A. Pollution
B. Deforestation
41. Which is the correct formula in calculating population density?
A. D = number of runs / total population
B. D = population x area
C. D = number of runs x total population
D. D = pcpulation/area
C. Overfishing
D. Eutrophication
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- 1. Red-green colorblindness is caused by a recessive allele (x) at an X-linked gene, and albinism is caused by a recessive allele (a) at an autosomal gene. A phenotypically normal woman (Sara) has a father who is colorblind, and she knows that she is a carrier for albinism. She plans to have a child with a colorblind man (Abdul) who is also a carrier for albinism. What is the probability that Sara and Abdul's child will have one of the conditions, but not both? (C. Follow the steps below to answer this question. a) What is the cross? b) What are the target genotypes? Note: it might be useful to come back to this one and double- check it after you have completed step c, below. Break this down to the single gene level by answering the following questions: a. What is the proportion of normal to albino offspring? Show the Punnett square: b. What is the proportion of normal to colorblind offspring? Show the Punnett square: d) What is the probability that Sara and Abdul's child will have one…arrow_forward1. An albino man whose parents are both normal marries a woman one of whose parents is normal and the other albino. She has an albino sister. The couple has a normal son. a. Is albinism a dominant or a recessive trait? Explain your answer. b. Give the genotypes of all the persons involved. c.The couple plans to have more kids. What is the probability of their second child being normal?arrow_forward8. Albinism in humans is heritable condition resulting in the inability to produce the pigment melanin, which is responsible for hair, eye and skin coloration. The allele for the albino condition is recessive to the allele for melanin production. What is the probability of two heterozygous parents producing a family of two normal children and one albino child?arrow_forward
- 36. Look at this pedigree and circle each row yes/no. Any assumption (that is not outrageous) can be made), for example, can assume someone is a carrier. a. Could this trait be inherited as a simple autosomal recessive? YES oo 8995 ON b. Could this trait be inherited as a simple autosomal dominant? YES ON C. Could this trait be inherited as a simple x linked recessive? YES ON d. Could this trait be inherited as a simple x linked dominant? YES ON e. Could this trait be inherited as a Y linked? YES ONarrow_forward3) In the snail Capaea nemoralis, an autosomal allele causing a banded shell (B®) is recessive to the allele for an unbanded shell (B°). Genes at a different locus determine the background color of the shell; here yellow (C') is recessive to brown (CBw). A banded, yellow snail is crossed with a homozygous brown, unbanded snail. The F1 are then crossed with banded, yellow snails (a test cross). a. What will the results of the testcross be in the loci that control banding and color ARE linked with NO crossing over.arrow_forward6) Duchenne muscular dystrophy (DMD) is a muscle wasting disease and is an X-linked recessive disorder. A man with this disease has children with a woman who does not have the disease, but her father did. If they had a ason, what would be the chance that he would have DMD? If they had a daughter? Any child? Construct a Punnett square to determine the answers. 10) In cats, coat color is completely dominant to albino (Mendelian genetics) and is an autosomal trait. Playa is a female albino cat and is crossed with Azul, a black-coated male. In their first litter, they have 4 black kittens and 2 albino kittens. If in the second litter, they have 8 kittens, how many of the kittens are expected to be albino? Construct a Punnett Square to determine the answer.arrow_forward
- A turkey farmer is worried about a new disease that is found in his birds. If affects females more than males. Which of the following is(are) reason(s) that explain this finding? The disease is sex linked b The disease is autosomal recessive c The disease is located on the Z chromosome d A and C e B and Carrow_forward7. Hereditary ichthyosis in humans is a sex-linked trait. If a normal male and a carrier female produce offspring, what will be the phenotypic ratios of: Normal females to scaly females? Normal males to scaly males? 8. Raedwald is color blind. His four sisters and his parents all have normal color vision. Who passed this condition on to Raedwald, and what can be said for certain about the genotypes of his maternal and paternal grandparents? wwwwMarrow_forward5. Cystic fibrosis in humans is caused by a recessive allele. Two unaffected parents have a child with cystic fibrosis. a. What is the probability that this couple's next child will be unaffected?arrow_forward
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