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.
Summer temperatures can get hot at Yosemite Valley. Normally all but a couple of days in summer heat up to at least 80 Fahrenheit, with about half making it to 90 degrees or more. Every couple of years, a day in July or August will reach 100 Â°F (38 Â°C). Days per month in Yosemite of at least 70, 80 or 90 Â°F. 70 Â°F.