Laboratory Manual For Human Anatomy & Physiology
4th Edition
ISBN: 9781260159363
Author: Martin, Terry R., Prentice-craver, Cynthia
Publisher: McGraw-Hill Publishing Co.
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Chapter 62, Problem 3.1A
Determine the results from a cross of a mother who is heterozygous (Rr) for tongue rolling with a father who is homozygous recessive (rr).
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Purple Hair is dominant. Blue hair is recessive. One parent is heterozygous; the other parent has blue hair.
A.) What is the probability of them having a blue-haired child?
Black eye (B) is dominant over brown eye (b). A man that is a homozygous dominant black-eyed marries a woman that is a heterozygous black-eyed. The offspring resulted to 50% homozygous black and 50% heterozygous black. If one of their heterozygous children marries another heterozygous partner. Regardless of its gender, what are the genotypes of their children?
a. 25% BB, 50% Bb, 25% bb
b. 50% BB, 25% Bb, 25% bb
c. 25% BB, 25% Bb, 50% bb
d. 0% BB, 75% Bb, 25% bb
In Law of Codominance, a pure line dominant trait crossed with a recessive trait will result to the appearance of both dominant and recessive trait in the offspring. What is the percentage of having a red-haired offspring if the parental genotype is both a heterozygous roan haired? Red hair is a dominant trait and white hair is a recessive trait.
a. 100%
b. 75%
c. 50%
d. 25%
e. 0%
(a) Enter the parent phenotypes and complete the Punnett square
Inheritance of sex linked recessive tralts
Example: Hemophilia
Female paront phenotype
Inheritance of hemophilia is sex linked. Males with the recessive
(hemophilia) allele, are affected. Females can be carriers.
(normal female)
Xxh (carrier female)
ben-N werxhxh (hemophiliac female)
leizobXY (normal male)
xhy (hemophiliac male)
Male parent phenotype:
Using the codes: XX
eggs
(a) Enter the parent phenotypes and complete the Punnett square
for a cross between a normal male and a carrier female.
sperm
(b) Give the ratios for the phenotypes from this cross.
Phenotype ratios:
Inheritance of sex linked dominant traits
Example: Sex linked form of rickets
A rare form of rickets is inherited on the X chromosome.
Using the codes: XX
Female parent phenotype:
alvo eo
(normal female); XY (normal male)
(affected heterozygote female)
XRXR (affected female)
XRY
Male parent phenotype:
XRX
eggs
(affected male)
Nor a cross between an…
Chapter 62 Solutions
Laboratory Manual For Human Anatomy & Physiology
Ch. 62 - The term _________ is used for a person possessing...Ch. 62 - The term _________ is used for the appearance of...Ch. 62 - The _________ is a genetic tool to simulate all...Ch. 62 - Prob. 4PLCh. 62 - Which of the following represents a dominant human...Ch. 62 - An attached earlobe is considered a recessive...Ch. 62 - A diploid chromosome number of 46 and a haploid...Ch. 62 - The possession of freckles is considered a...Ch. 62 - Single penny tossed 20 times and counting heads...Ch. 62 - Determine the results from a cross of a mother who...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Imagine that a couple is planning to have children. The male is heterozygous for Huntington’s disease and homozygous dominant for Tay-Sachs. The female is homozygous recessive for Huntington’s disease and heterozygous for Tay-Sachs. The couple is curious about the possibility and probability of their offspring inheriting Tay-Sachs and/or Huntington’s. For humans, Huntington’s disease is dominant (H) over the “normal” condition (h), and the “normal” condition is dominant (T) over Tay-Sachs (t). Complete a Punnett square for this cross and record the probabilities for genotypes and phenotypes of the offspring as ratios.arrow_forwardPlease define the following terms: Gene Allele Dominant Recessive Homozygous Heterozygousarrow_forwardDemonstrate 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_forward
- Imagine a cross between a man and a woman having the following genotypes: Genotype of the Husband Genotype of the Wife Aa bb Dd Gg Hh RR Tt X Aa Bb Dd gg Hh Rr Tt Assuming that the dominant allele in each gene pair exhibits complete dominance over the recessive allele, what is the probability that this couple would have a daughter who exhibits the recessive phenotype with respect to all seven of the gene pairs?arrow_forwardShow the results of a monohybrid cross for the F1 and F2 generation between P generation of a woman who is homozygous dominant for unattached ear lobe with a man who is homozygous recessive for attached ear lobe. Clearly show the cross indicating parent’s sex, genotype and phenotype for each generation. How many offspring in the F2 generation will have attached or detached earlobe?arrow_forwardBbRrppMm X bbRrPpMM Based on the cross provided what is the probability of producing an individual that is dominant for B & M and recessive for R and P?arrow_forward
- When Widow’s peak is dominant over straight hairline. What are the genotypic outcomes of a cross between an individual who is homozygous recessive and one who is heterozygous. Find if this is homozygous or homozygous recessive ratios of the offspring of the following cross. Bbaa x bbAaarrow_forwardBoth red/green color blindness (R=normal, r=colorblind) and Duchenne-type muscular dystrophy (D=normal, d=muscular dystrophy) are X-linked recessive traits that map close to each other. A woman has a father who is red/green color blind. Her mother's family has a history of Duchenne's muscular dystrophy. This woman is apparently healthy with neither color blindness nor muscular dystrophy. She marries a healthy man and they have four sons and two daughters. Half the sons are healthy but color blind, the other half have normal color vision, but have Duchenne's muscular dystrophy. The daughters are both normal. What is the genotype of the woman? ** The notation is written as X/X (so the / separates the two X chromosomes in a female) Group of answer choices RD/rd rd/rd Rd/rD RD/RDarrow_forwardman, assume that spotted skin (S) is dominant over non-spotted skin (s) and that wooly hair (W) is dominant over non-wooly hair (w). Cross a marriage between a heterozygous spotted, non-wooly man with a heterozygous wooly-haired, non-spotted woman. Give the genotypes and phenotype of offspring.arrow_forward
- Duchenne Muscular Dystrophy (DMD) is an X-linked recessive trait. Fill in a Punnett square for a man with DMD and a woman who carries DMD. Then use your Punnett square to answer the following questions: A) What is the probability that one of their daughters will have DMD? ___% B) What is the probability that one of their daughters is a carrier of DMD? ______ % C) What is the probability that one of their sons will have DMD? ______ % D) What is the probability that one of their sons is a carrier of DMD? ______ % E) On which chromosome is the gene for DMD located? _____arrow_forwarda normal woman (for colorblindness) and with straight hair but who has a father with curly hair and a mother with colorblindness, marries a normal man (for colorblindness) with straight hair (dominant homozygous for this feature). What is the probability that they will give birth to homozygous children for both traits? Determine the possible genotypes of the offspringarrow_forwardCross a female (XX) with a male (XY). Provide the genotypic and phenotypic ratio of the crossarrow_forward
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