A trisomy. Trisomies are usually fatal in all chromosome pairs except 5, 13, 21 (these cause Down syndrome), and 23 (The chromosome pair that determines gender)
It is fully diploid - chromosome configuration 2n -.
Chromosomal disjunction during meiosis leaving one of the gametes that meet in random fertilization short an X chromosome is the simplest fertilization mishap that results in Turner's syndrome. One X chromosome.
If chromosome 21 does not separate during meiosis, it can lead to a condition known as nondisjunction. This results in gametes with an abnormal number of chromosomes, specifically an extra copy of chromosome 21 in this case. If such a gamete participates in fertilization, the resulting embryo may develop into a person with Down syndrome, characterized by developmental delays and various physical features. This condition arises due to the presence of three copies of chromosome 21, a phenomenon called trisomy 21.
Down syndrome
Down syndrome occurs when an individual receives an extra 21st chromosome.
Fertilization results in the formation of a new cell with a full set of chromosomes.Answer 2:Mitosis results in the formation of a new cell with a full set of chromosomes
A trisomy is a condition in which a person has three copies of a chromosome instead of the usual two copies. A person can have full trisomy (three copies in every cell) or mosaic trisomy (three copies in some cells but not all).
Down syndrome results when cells receive three copies of chromosome 21.
When two sperms enter the egg during fertilization, it results in an abnormal number of chromosomes in the embryo, leading to a condition called triploidy. This usually results in a nonviable pregnancy and early miscarriage.
The genotype XO results from the absence of a second sex chromosome in an individual. This condition is known as Turner syndrome and is characterized by a single X chromosome in females instead of the usual two. It can lead to various developmental and physical abnormalities.
Cri du Chat Syndrome or Chromosome 5p- is a chromosomal condition that results in brain abnormalities.
Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of the X chromosome. Klinefelter syndrome is a common genetic condition affecting males.