Choose one pls Identify the type of trait(s) in the pedigree below *autosomal recessiveautosomal dominantX-linked dominantX-linked recessiveY-linked

Answered: autosomal recessive autosomal dominant…

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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Choose one pls

Identify the type of trait(s) in the pedigree below *
autosomal recessive
autosomal dominant
X-linked dominant
X-linked recessive
Y-linked

Expert Solution

PEDIGREE ANALYSIS

Answer: A pedigree is a fmily tree or chart made of symbols and lines that represent a person genetic family history. In oedigree, symbols represent people and lines represent genetic relationships. the pedigree is a visual tool for documenting the biological relationship in families and determine the mode of inheritance ( dominant , recessive etc) of genetic diseases. pedigrees are most often constructed by medical genetisists or genetic counselors.

VARIOUS TYPES OF PATTERNS IN PEDIGREE:

AUTOSOMAL RECESSIVE INHERITANCE:

traits often skip generations
an almost equal number of affected males and females
if both parents are affected , all children should be affected
most affected individuals have unaffected parents.

AUTOSOMAL DOMINANT INHERITANCE:

traits should not skip generations
an affected person mating with an unaffected person should produce approx 50% affected offspring
the distribution of the traits among the offspring should be equal
transmitted by either sex

X- LINKED RECESSIVE INHERITANCE

most affected individuals are male
affected males should results from mothers who are affected or who are known to be carriers
affected females come from affected father and affected or carrier mother
the sons of affected mothers should be affected
approx half the sons of carriers should be affected

X-LINKED DOMINANT INHERITANCE

the trait does not skip generations
affected males must come from affected mothers
approx half the children of an affected heterozygous females are affected
affected females come from affected mother or father
all the daughters , but none of the sons, of an affected father are affected

Y-LINKED INHERITANCE

affects only males
affected males always have an affected father
all sons of an affected man are affected

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