A human female with Turner's syndrome:
Correct answer: A. Has 45 chromosomes with XO
- A. Has 45 chromosomes with XO
- B. Has one additional X chromosome
- C. Exhibits male characters
- D. Is able to produce children with normal husband.
Explanation
A human female with Turner's syndrome has single-sex chromosome i.e., 44 + X0 (45). Such females are called sterile females with rudimentary ovaries. Other associated phenotypes of this condition are short stature, webbed-neck, broad chest, lack of secondary sexual characteristics, and sterility. Thus, any imbalance in the copies of the sex chromosomes may disrupt the genetic information necessary for normal sexual development.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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