Males, on the other hand, are heterogametic, with one X chromosome and one Y chromosome. Other reptiles governed by GSD have a system, similar to one found in birds, with Z and W sex chromosomes. In this caseâwhich governs all snake speciesâmales are the homogametic sex (ZZ) and females are the heterogametic sex (ZW).
Yosemite Packing List. Your trip with Four Season Guides is sure to be one you never forget, but a big part of having lots of fun is being well prepared! Even though we provide the camping equipment essentials, there are a few things we want to be sure you donât forget! Hiking boots â well broken in!! Mid-weight boots with ankle support are best.
Exception to this is the dayhike up Half Dome, which is controlled by a quota to keep it from getting too overcrowded and thus requires a permit. Backpacking is defined in the USA as sleeping out overnight (or many nights) in the wilderness and carrying with you all the gear and food you will need, for that you need a permit in Yosemite.