male affected with haemophilia unaffected male unaffected female Rhesus Rhesus positive negative 4. 7 Rhesus Rhesus Rhesus Rhesus Rhesus positive positive positive positive positive 9 10 11 Rhesus Rhesus Rhesus Rhesus negative positive positive positive 12 Rhesus negative The allele for Rhesus positive, R, is dominant to that for Rhesus negative, r. Haemophilia is a sex-linked condition. The allele for haemophilia, h, is recessive to the allele for normal blood clotting, H, and is carried on the X-chromosome. The diagram shows the Rhesus blood group phenotypes in a family tree where some individuals have haemophilia. Use the information in the diagram to give one piece of evidence that the allele for the Rhesus negative condition is recessive. Explain the evidence from the cross between individuals 3 and 4 that the gene controlling Rhesus blood group is not sex-linked

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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male affected with haemophilia
unaffected male
2
unaffected female
Rhesus
Rhesus
positive
negative
30
4
6
7
Rhesus
Rhesus
Rhesus
Rhesus
Rhesus
positive
positive
positive
positive
positive
8
9
10
11
Rhesus
Rhesus
Rhesus
Rhesus
negative
positive
positive
positive
12
Rhesus
negative
The allele for Rhesus positive, R, is dominant to that for Rhesus negative, r.
Haemophilia is a sex-linked condition. The allele for haemophilia, h, is recessive to
the allele for normal blood clotting, H, and is carried on the X-chromosome. The
diagram shows the Rhesus blood group phenotypes in a family tree where some
individuals have haemophilia.
Use the information in the diagram to give one piece of evidence that the allele for
the Rhesus negative condition is recessive.
Explain the evidence from the cross between individuals 3 and 4 that the gene
controlling Rhesus blood group is not sex-linked
Transcribed Image Text:male affected with haemophilia unaffected male 2 unaffected female Rhesus Rhesus positive negative 30 4 6 7 Rhesus Rhesus Rhesus Rhesus Rhesus positive positive positive positive positive 8 9 10 11 Rhesus Rhesus Rhesus Rhesus negative positive positive positive 12 Rhesus negative The allele for Rhesus positive, R, is dominant to that for Rhesus negative, r. Haemophilia is a sex-linked condition. The allele for haemophilia, h, is recessive to the allele for normal blood clotting, H, and is carried on the X-chromosome. The diagram shows the Rhesus blood group phenotypes in a family tree where some individuals have haemophilia. Use the information in the diagram to give one piece of evidence that the allele for the Rhesus negative condition is recessive. Explain the evidence from the cross between individuals 3 and 4 that the gene controlling Rhesus blood group is not sex-linked
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