Download now. Open iCloud for Windows and sign in with the Apple ID you used to create your iCloud account. Select the iCloud services youâd like to enable and click Apply. When you enable iCloud Drive and Photos, iCloud for Windows creates new folders for those files in Windows Explorer.
More than 95% of the Y chromosome is male-specific (4) and a single copy of the Y chromosome is able to induce testicular differentiation of the embryonic gonad. The Y chromosome acts as a dominant inducer of male phenotype and individuals having four X chromosomes and one Y chromosome (49XXXXY) are phenotypically male. (5) When a Y chromosome is present, early embryonic testes develop around the 10th week of pregnancy.
The numbered pairs (1-22) are called autosomes, and they are the same in boys and girls. The 23rd pair is the sex chromosomes. These are the ones that are different in boys and girls. Boys have an X and a Y and girls have two X chromosomes.