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Colour blindness is a sex linked disorder caused by a recessive allele carried on the X chromosome. Draw a genetic diagram for a colour blind male with a carrier female, to predict the possible genotypes of their offspring. Explain why colour blindness is more common in females than haemophilia.

Colour blindness is a sex linked disorder caused by a recessive allele carried on the X chromosome. Draw a genetic diagram for a colour blind male with a carrier female, to predict the possible genotypes of their offspring. Explain why colour blindness is more common in females than haemophilia.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Merit (M3) 5. In a certain plant, red fruit, R, is dominant to green fruit, r. A heterozygous plant with red fruit is crossed with a plant with red fruit. a. Determine the probable genotypic and phenotypic ratios resulting from this cross. b. Determine the probable genotypic and phenotypic ratios expected from crossing two heterozygous plants. 6. Assume that brown eyes are dominant to blue eyes. A father who is heterozygous brown eyed and a heterozygous brown eyed mother have children. a. What are genotypes and phenotypes of the offspring? b. What is the probability of them having a blue eyed child? 7. Mum has type A blood. Dad has type AB blood. What possible blood types could their children inherit? (Show all possibilities). 8. Mum has type B blood. Dad has type O blood. They have a child with type 0 blood. Make a Punnett square to show what Mom's genotype must be to have a child with type O blood. 9. A wealthy elderly couple dies together in an accident. A man comes forward, claiming that he is their long lost son and is entitled to their fortune. The couple were of blood types AB and O. The man has type O blood. Could he be the heir to the fortune? Show why or why not. 10. Haemophilia is a sex linked disorder caused by a recessive allele carried on the X chromosome. a. Draw a genetic diagram for a female carrier with a haemophiliac male, to predict the possible genotypes of their offspring. b. Explain why haemophilia is more common in males than females. 11. Colour blindness is a sex linked disorder caused by a recessive allele carried on the X chromosome. a. Draw a genetic diagram for a colour blind male with a carrier female, to predict the possible genotypes of their offspring. b. Explain why colour blindness is more common in females than haemophilia.
Transcribed Image Text:Merit (M3) 5. In a certain plant, red fruit, R, is dominant to green fruit, r. A heterozygous plant with red fruit is crossed with a plant with red fruit. a. Determine the probable genotypic and phenotypic ratios resulting from this cross. b. Determine the probable genotypic and phenotypic ratios expected from crossing two heterozygous plants. 6. Assume that brown eyes are dominant to blue eyes. A father who is heterozygous brown eyed and a heterozygous brown eyed mother have children. a. What are genotypes and phenotypes of the offspring? b. What is the probability of them having a blue eyed child? 7. Mum has type A blood. Dad has type AB blood. What possible blood types could their children inherit? (Show all possibilities). 8. Mum has type B blood. Dad has type O blood. They have a child with type 0 blood. Make a Punnett square to show what Mom's genotype must be to have a child with type O blood. 9. A wealthy elderly couple dies together in an accident. A man comes forward, claiming that he is their long lost son and is entitled to their fortune. The couple were of blood types AB and O. The man has type O blood. Could he be the heir to the fortune? Show why or why not. 10. Haemophilia is a sex linked disorder caused by a recessive allele carried on the X chromosome. a. Draw a genetic diagram for a female carrier with a haemophiliac male, to predict the possible genotypes of their offspring. b. Explain why haemophilia is more common in males than females. 11. Colour blindness is a sex linked disorder caused by a recessive allele carried on the X chromosome. a. Draw a genetic diagram for a colour blind male with a carrier female, to predict the possible genotypes of their offspring. b. Explain why colour blindness is more common in females than haemophilia.
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