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Full-Text Articles in Life Sciences
Genetics And Some Aging-Related Mechanisms, Şükran Çakir
Genetics And Some Aging-Related Mechanisms, Şükran Çakir
Turkish Journal of Zoology
Aging can be defined as the time-dependent decline of physiological functions of an organism. Aging, a multifactorial process composed of both genetic and environmental components, is a highly complex biologic phenomenon of great importance. The details of the mechanisms leading to aging are not yet known. All changes in the process of aging have a cellular basis, and perhaps aging should be studied, fundamantally, at the cellular level under defined and controlled environmental conditions. Some genetic approaches have promise for the understanding of this multifactorial process. In this review, some causal hypotheses related to oxidative damage, caloric restriction, mitochondrial mutations, …
On The Polymorphic Meadow Spittlebug, Philaenus Spumarius (L.) (Homoptera: Cercopidae), Selçuk Yurtsever
On The Polymorphic Meadow Spittlebug, Philaenus Spumarius (L.) (Homoptera: Cercopidae), Selçuk Yurtsever
Turkish Journal of Zoology
Due to its interesting biological aspects, the meadow spittlebug Philaenus spumarius has received great attention from biologists for decades. It has been one of the extensively studied species in ecology and genetics. This homopteran insect shows very high habitat diversity and therefore has a wide global distribution. Adults exhibit a heritable colour/pattern polymorphism on the dorsal surface throughout its range. A similar colour/pattern variation also occurs in certain ventral parts. Recent laboratory studies have dealt with its polyandrous aspect that is, females may mate several times with different males and the offspring of a single female may be fathered, therefore, …