Cruise ship tour: Last look at the original 'Love Boat'. One of the most famous cruise ships of the modern era, the former Pacific Princess, is being dismantled at a scrapyard in Turkey.
The male parent does. Sex is determined by two chromosomes, X and Y. A female is XX, a male is XY. Since women completely lack the Y choromosome, they always contribute an X chromosome to the baby.The sex is determined by whether the sperm that fertilizes the egg is carrying another X or a Y.es | No Thank you! The male parent does. Sex is determined by two chromosomes, X and Y. A female is XX, a male is XY. Since women completely lack the Y choromosome, they always contribute an X chromosome to the baby. The sex is determined by whether the sperm that fertilizes the egg is carrying another X or a Y.
The notion that sex could be determined by chromosomes was a new idea. Prior to Henking, McClung, and Sutton's reports, sex determination was attributed to factors other than gametes, such as the environment in which egg cells existed.ilson then defined the two groups based on how their sex chromosomes separated into gametes. His descriptions were as follows, and they are also summarized in Table 2: 1  Type A species: In organisms of these species, male somatic cells have one unpaired chromosome, the accessory.