Question

XXX refers to ___________.
A. Normal female
B. Super female
C. Metal female
D. Normal (triploid) female

Answer 1

Hint:- Chromosomes are the thread-like structures that are present in the nucleus of animal and plant cells. These are made up of protein and carry genes from generation to another during the cell division. They are also responsible for male and female genders. There are 46 chromosomes in humans, which mean 23 pairs.

Complete step-by-step solution:- From the given options, XXX refers to the chromosomal structure of a super female. This condition is also known as triple X syndrome or trisomy. The condition of 44-XXX is characterized by the presence of an additional X chromosome in each cell of the female.
The females having this condition are taller as compared to the average height. They do not show any other physical differences, and they have normal fertility.
Thus, the correct option is (B). Super female.
Additional information: A constricted region on the chromosome containing DNA sequences and linking a pair of sister chromatids is called a centromere. It forms the two arms of the chromosome.
The different types of chromosomes are given below;
Metacentric chromosomes are the chromosomes in which the centromere is located within the center. Both the arms of the chromosome are equal.
The submetacentric chromosomes bear centromere, which is slightly away from the center. This makes the arms of the chromosomes of unequal length.
The acrocentric chromosomes possess centromere at the sub-terminal position due to which one arm becomes extremely long, and the other becomes extremely short.
Telocentric chromosomes bear centromere at the terminal position, and this type of chromosomes bear only one type of arm.

Note:- In normal females, 44-XX chromosomes are present in each germ cell. The gametes are haploid and contain one X-chromosome. The haploid gamete is fused with the haploid sperm and forms a diploid zygote. This process of fusion of male and female gamete is known as fertilization.