Understanding XXY Chromosome Anomaly
A sex chromosome anomaly involving an extra X chromosome results in a genotype of XXY. This specific genetic condition leads to the development of Klinefelter's Syndrome.
Key Points:
- Klinefelter's Syndrome: Characterized by the presence of an extra X chromosome in males, resulting in an XXY karyotype.
- Down Syndrome: Caused by trisomy 21, meaning an extra copy of chromosome 21.
- Turner's Syndrome: Occurs when a female is missing one X chromosome, resulting in a XO karyotype.
- Phenylketonuria: An inherited metabolic disorder, not a chromosomal abnormality.
Therefore, the XXY sex chromosome anomaly specifically results in Klinefelter's Syndrome.
Important Questions from Human genetics
Mendel selected which of the following traits for his studies?
Two strains of mice which are genetically identical except for a single genetic locus or region are said to be:
Interacting genes which are involved in producing continuous variation in phenotypes in a population are known as/constitute
Sampling of 200 persons for their ABO blood group was done from an urban area. The types of blood group observed in the given population are as follows:
A = 60, B = 32, AB = 10 and O = 98
Which of the following gives the correct frequency of blood group determining alleles IA , IB and IO in the given population?
The table given below shows the Lod score values of three different pairs of genes studied for assessing if they are linked pairs:
Gene Pair '1' Gene Pair '2' Gene Pair '3' Lod Score 1 2 3 The following conclusions were made from the data given above:
A. For gene pair 1 the probability of the genes being linked is 10 times more likely than them assorting independently.
B. For gene pair 2, the Lod score 2 indicates that the probability of the genes being linked is twice more likely than assorting independently.
C. The genes of pair 1 and 2, can both be considered as linked, while the genes of pair 3 exhibits independent assortment.
D. The genes of pair 3 can be considered as linked.
Which one of the following options represents statement(s) that is/are correct?
