In some species of reptiles, including alligatorssome turtlesand the tuatarasex is determined by the temperature at which the egg is incubated during a temperature-sensitive period. Curr Opin Cell Biol. The legs also have gills for gas exchange Most barnacles are hermaphrodites, meaning that one barnacle has both male and female sex organs.
This would be in accord with studies of male sex determination in mouse strains Mus domesticus and Mechanism of sex determination in non-human organisms in Oceanside musculuswhich have implicated at least three autosomal genes in testicular differentiation.
Help Community portal Recent changes Upload file. The HMG box is otherwise shown in blue, C-terminal basic tail in red residuesmore Male somatic phenotype is induced by 14 kb genomic fragment of Y chromosome containing Sry open reading frame orf ; top panel.
J Mol Microbiol. Corresponding author.
Sperm from the male have the same autosomal number and either an X or a Y chromosome. The number of sets of chromosomes an individual receives is the basis of the sex-determination in honey bee. Thus, when spliced tra RNA is translated, it generates a truncated polypeptide.
Once the X : A ratio is ascertained, it is converted into a molecular signal that controls expression of the X-linked sex lethal gene Sxlthe master regulator of the sex determination pathway.
Figure 1 The HMG box. Zoea and megalops larvae live in the water with other plankton. At this stage the hermit crab is known as a zoea larva, which grows by molting.