In chickens, cock feathering is an autosomal recessive trait that is limited to males. Is it possible to cross a cock-feathered male with a hen-feathered female and get male progeny that are cock-feathered? Explain your reasoning.

In chickens, cock feathering is an autosomal recessive trait that is limited to males. Is it possible to cross a cock-feathered male with a hen-feathered female and get male progeny that are cock-feathered? Explain your reasoning.

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Description: In chickens, cock feathering is an autosomal recessive trait that is limited to males. Is it possible to cross a cock-feathered male with a hen-feathered female and get male progeny that are cock-feathered? Explain your reasoning.

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter20: Chromosomes And Human Genetics

Section: Chapter Questions

Problem 7CT: The following pedigree shows the pattern of inheritance of red-green color blindness in a family....

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The following pedigree shows the pattern of inheritance of red-green color blindness in a family. Females are shown as circles and males as squares; the squares or circles of individuals affected by the trait are filled in black. What is the chance that a son of the third-generation female indicated by the arrow will be color blind if the father is not color blind? If he is color blind?
In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in females. Is it possible to cross two bearded goats and obtain a beardless male offspring? Why or why not? What about a bearded female offspring?
In some sheep, horns are produced by an autosomal allele that is dominant in males and recessive in females. A horned female is crossed with a hornless male. One of the resulting F1 females is crossed with a hornless male. What proportion of the male and female progeny from this cross will have horns?
Duchenne muscular dystrophy (DMD), marked by muscular degeneration, results from an X- linked recessive gene. Thus, a female who is heterozygous for this gene and does not have the disease can be a carrier. What kind of offspring can you expect from a DMD-affected male and a carrier female? Can there be a carrier male?
A man and a woman are both carriers for cystic fibrosis (an autosomal recessive allele). Neither of them, nor their first daughter have cystic fibrosis. What is the probability that their next child will have cystic fibrosis? Explain your reasoning.
In humans, brown eyes (B) are dominant over blue. A brown eyed man marries a blue-eyed (b) woman and they have three children two of whom are brown-eyed and one of whom is blue-eyed. if blue is recessive, what must the woman’s genotype be?
Cystic fibrosis is a recessive human condition. A male with Cystic fibrosis and a woman with a dominant phenotype have sevral children, in which one displays Cystic fibrosis. What can you conclude about the genotype of the maternal parent and what is the probability that a child who does not display Cystic fibrosis is heterozygous?
A human female who is heterozygous for the recessive, sex-linked trait causing red-green color blindness, marries a normal male. What proportion of their male progeny will have red-green color blindness?
In humans, the genes for colorblindness and hemophilia are both located on the X chromosome with no corresponding gene in the Y. These are both recessive alleles. If a man and a woman, both with normal vision, marry and have a colorblind son, draw the Punnet square that illustrates this. If the man dies and the woman remarries a colorblind man, draw a Punnet Square showing the type of children that could be expected from the second marriage. How many/what percentages of each could be expected.
Consider a cross between a Brown furred dog and a Yellow furred dog. All the puppies born from these parents are yellow furred. Crossing the F1 yellow furred sons and F1 yellow furred daughters produces a 3:1 ratio of yellow furred dogs (3) to brown-furred dogs (1) in the F2 generation. True or False: this tells you that brown fur color in this dog species is inherited in an autosomal recessive manner. is it true or false?
In humans, Cystic Fibrosis is caused by a recessive allele on chromosomes 7. A person must inherit two of these alleles to have the disease. What are the chances of a child having the disease if both of the parents are heterozygous?
We know that the most common form of color blindness results from an X linked recessivegene. A couple with normal color vision has a daughter with normal vision and a son who is colour-blind. What is the probability that the daughter is a carrier for the colour-blindness allele? Draw punnet square/pedigree to support your results.