The iPhone X is goes up for pre-order on Oct. 27. Do you buy from Apple or the four major U.S. carriers (AT&T, Verizon, T-Mobile, Sprint)? We have answers.
A karyotype refers to a full set of chromosomes from an individual that can be compared to a normal karyotype for the species via genetic testing. A chromosome anomaly may be detected or confirmed in this manner. Chromosome anomalies usually occur when there is an error in cell division following meiosis or mitosis.
So during meiosis the chromosome number is halved eg from 46 to 23 in humans, so that the egg carries 23 chromosome and the sperm carries 23 chromosomes. When fertilization occurs the normal chromosome number is restored.