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In Turner’s syndrome

a)

Female is fertile

b)

Male is fertile

c)

Female is sterile

d)

Male is sterile


Question ID - 7340 | SaraNextGen Top Answer

In Turner’s syndrome

a)

Female is fertile

b)

Male is fertile

c)

Female is sterile

d)

Male is sterile

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

Female is sterile.

Disorders

Autosomal/Sex Linked

Symptoms

Effects

Down’s syndrome

Autosomal aneuploidy (trisomy, +21)

Mongolian eyefold (epicanthus), open mouth, protruded tongue, projected lower lip, many loops on finger tip, palm crease

Retarded mental development IQ (below 40)

Turner’s syndrome

Sex chromosomal monosomy 44 + XO

Short stature females (<5’), webbed neck, body hair absent menstrual cycle absent. Sparse pubic hair, underdeveloped breasts narrow lips puffy fingers

Sterile hearing problem

Klinefelter’s syndrome

Sex chromosomal aneuploidy (tri/tetrasomy of X chromosome) 44+XXY 44+XXXY

The males are tall with long legs, testes small, sparse body hair, Barr body present, breast enlargement

Gynaecomastia azospermia sterile

 

Some Examples of Aneuploidy

(i) Down’s syndrome-21 trisomy

Symptoms

(a) Short statured with small round head

(b) Partially open mouth with protruding furrowed tongue

(c) Palm is broad with characteristic palm crease

(d) Slow mental development

(ii) Turner’s syndrome

Cause Absence of one of the X-chromosomes, resulting in the karyotype 44+XO

Symptoms

(a) Sterile female with rudimentary ovaries

(b) Shield-shaped thorax

(c) Webbed neck

(d) Poor development of breasts

(e) Short stature, small uterus, puffy fingers

(iii) Klinefelter’s syndrome

Cause Presence of an additional copy of X-chromosome resulting in the karyotype 44+XXY

Symptoms

(a) Sex of the individual is masculine but possess feminine characters

(b) Gynaecomastia, i.e., development of breasts

(c) Poor beard growth and often sterile

(d) Feminine pitched voice
127 votes

127
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