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This unusually lengthy mating is due to the physical nature of the male's erect penis, which has backwards-pointing spines along most of its length. [20] Fossa mating includes a copulatory tie, [15] which may be enforced by the male's spiny penis. [20] The tie is difficult to break if the mating session is interrupted. [15]
The human Y chromosome showing the SRY gene which codes for a protein regulating sexual differentiation. Sexual differentiation in humans is the process of development of sex differences in humans. It is defined as the development of phenotypic structures consequent to the action of hormones produced following gonadal determination. [1]
The relationship between sex differences in the brain and human behavior is a subject of controversy in psychology and society at large. [ 118 ] [ 119 ] Many females tend to have a higher ratio of gray matter in the left hemisphere of the brain in comparison to males.
Researchers have investigated the relationship between race and genetics as part of efforts to understand how biology may or may not contribute to human racial categorization. Today, the consensus among scientists is that race is a social construct, and that using it as a proxy for genetic differences among populations is misleading. [1] [2]
The Malagasy or striped civet (Fossa fossana), also known as the fanaloka (Malagasy, [fə̥ˈnaluk]) or jabady, [5] is an euplerid endemic to Madagascar. [6] It is the only species in genus Fossa . The Malagasy civet is a small mammal , about 47 centimetres (19 in) long excluding the tail (which is only about 20 centimetres (7.9 in)).
Sex differences in human physiology are distinctions of physiological characteristics associated with either male or female humans. These can be of several types, including direct and indirect, direct being the direct result of differences prescribed by the Y-chromosome (due to the SRY gene ), and indirect being characteristics influenced ...
Extant primates exhibit a broad range of variation in sexual size dimorphism (SSD), or sexual divergence in body size. [4] It ranges from species such as gibbons and strepsirrhines (including Madagascar's lemurs) in which males and females have almost the same body sizes to species such as chimpanzees and bonobos in which males' body sizes are larger than females' body sizes.
A 1994 examination of 32 English sport/exercise science textbooks found that 7 (21.9%) claimed that there are biophysical differences due to race that might explain differences in sports performance, 24 (75%) did not mention nor refute the concept, and 1 (3.1%) expressed caution with the idea. [180]