Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Examples of X-linked recessive disorders:
• Red-green color-blindness
• Hemophilia (fig. 92)
• Duchenne muscular dystrophy (DMD)
Father has
hemophilia XY
Mother is not a carrier
of the hemophilia gene XX
Father does not
Mother is a carrier
have hemophilla XY
of the hemophilia gene XX
50% chance
daughters will be a carrier
of the hemophilia gene XX
50% chance
sons will have
hemophilia XY
0% chance
sons will have
100% chance
daughters will be a carrier
of the hemophilia gene XX
hemophilia XY
Does not have
Key Hemophila
Has Hemophilia
Carrier of the
Key
Does not have
Hermophilia
Carrier of the
Hemophilia gene
Has Hemophilia
Hemophilia gene
a
b
Fig. 92. Inheritance of hemophilia or bleeder's disease (a) when mother
is a carrier, and (b) when father has the condition.
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Transcribed Image Text:Examples of X-linked recessive disorders: • Red-green color-blindness • Hemophilia (fig. 92) • Duchenne muscular dystrophy (DMD) Father has hemophilia XY Mother is not a carrier of the hemophilia gene XX Father does not Mother is a carrier have hemophilla XY of the hemophilia gene XX 50% chance daughters will be a carrier of the hemophilia gene XX 50% chance sons will have hemophilia XY 0% chance sons will have 100% chance daughters will be a carrier of the hemophilia gene XX hemophilia XY Does not have Key Hemophila Has Hemophilia Carrier of the Key Does not have Hermophilia Carrier of the Hemophilia gene Has Hemophilia Hemophilia gene a b Fig. 92. Inheritance of hemophilia or bleeder's disease (a) when mother is a carrier, and (b) when father has the condition.
4. What mode of inheritance is shown in the
pedigree chart on the left? Justify your
answer.
5. Construct pedigree charts using the inheritance of hemophilia in figure
92 (page 113). This is X-linked inheritance so you are required to label
XX for females and XY for males. The gene responsible for the trait is
represented by the superscript which should be specified in the legend.
expand button
Transcribed Image Text:4. What mode of inheritance is shown in the pedigree chart on the left? Justify your answer. 5. Construct pedigree charts using the inheritance of hemophilia in figure 92 (page 113). This is X-linked inheritance so you are required to label XX for females and XY for males. The gene responsible for the trait is represented by the superscript which should be specified in the legend.
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