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LIZARD REPRODUCTION
Females:
The age in which females are able to reproduces ranges according to size. For the most part however, smaller female lizards, like the Northern Fence, usually reach sexual maturity at the age of one or two years. When females are able to reproduce, they find a mate and use internal fertilization to create off springs. Moreover, female lizards have two pairs of ovaries and oviducts in their reproduction system, like female humans. The female lizards’ ovaries and Fallopian link to “the urodeum of the cloaca are divided into four regions: infundibulum; magnus, uterus, and vagina”. Additionally, the females carry their eggs in their oviducts, and unlike humans, the offspring does not develop in the uterus.
Males:
Northern Fence males have two penises, referred to as hemipenis which they inject at a time, into their females mates’ cloaca. During this process of internal fertilization, the male inserts its sperm into the female, enabling the gametes to join. “Before actual copulation, the pair usually engages in some type of ritualized courtship. After copulation, sperm can be stored for up to 6 years. This stored sperm can fertilize subsequent clutches (groups of eggs) without additional contact by a male” (A).
How they Mate:
Like all lizards, Northern Fence Lizards reproduce sexually through meiosis and the process of internal fertilization. In order to mate, the male and the female are either attracted through prezygotic factors and courtship. After having attracted their mate, the male and the female reproduce by the male entering his penis's into the females reproductive organ, the cloaca. This lets the sperm go into the female to be fertilized. Lizards gametes, or sex sells have a diploid number of sixty chromosomes. Additionally, in lizards, female and males gametes join by meiosis, in which 30 haploid cells are received from each parent to make a total of 60 chromosomes.
The Lizard After it Hatches:
"After being laid, eggs double in size during embryonic development. Eggs hatch from June to September. Upon hatching, individuals are about half the size of adults. They tend to grow quickly in the first two months of life and are fully mature at 1 year. "
“have generally similar karyotypes with a diploid number of 32”
Northern Fence Lizards can live up to five to seven years, and both genders become sexually and fully mature at around one or two years old. The lizards do not require parental care, and the mother may lay a clutch of eggs every year, which normally consists of “3-16 off spring which are laid in late spring or early summer. The young hatch in summer and fall” (C ). Younger female lizards only lay one clutch of eggs a year, whereas older females lay up to four clutches of eggs per year.
The age in which females are able to reproduces ranges according to size. For the most part however, smaller female lizards, like the Northern Fence, usually reach sexual maturity at the age of one or two years. When females are able to reproduce, they find a mate and use internal fertilization to create off springs. Moreover, female lizards have two pairs of ovaries and oviducts in their reproduction system, like female humans. The female lizards’ ovaries and Fallopian link to “the urodeum of the cloaca are divided into four regions: infundibulum; magnus, uterus, and vagina”. Additionally, the females carry their eggs in their oviducts, and unlike humans, the offspring does not develop in the uterus.
Males:
Northern Fence males have two penises, referred to as hemipenis which they inject at a time, into their females mates’ cloaca. During this process of internal fertilization, the male inserts its sperm into the female, enabling the gametes to join. “Before actual copulation, the pair usually engages in some type of ritualized courtship. After copulation, sperm can be stored for up to 6 years. This stored sperm can fertilize subsequent clutches (groups of eggs) without additional contact by a male” (A).
How they Mate:
Like all lizards, Northern Fence Lizards reproduce sexually through meiosis and the process of internal fertilization. In order to mate, the male and the female are either attracted through prezygotic factors and courtship. After having attracted their mate, the male and the female reproduce by the male entering his penis's into the females reproductive organ, the cloaca. This lets the sperm go into the female to be fertilized. Lizards gametes, or sex sells have a diploid number of sixty chromosomes. Additionally, in lizards, female and males gametes join by meiosis, in which 30 haploid cells are received from each parent to make a total of 60 chromosomes.
The Lizard After it Hatches:
"After being laid, eggs double in size during embryonic development. Eggs hatch from June to September. Upon hatching, individuals are about half the size of adults. They tend to grow quickly in the first two months of life and are fully mature at 1 year. "
“have generally similar karyotypes with a diploid number of 32”
Northern Fence Lizards can live up to five to seven years, and both genders become sexually and fully mature at around one or two years old. The lizards do not require parental care, and the mother may lay a clutch of eggs every year, which normally consists of “3-16 off spring which are laid in late spring or early summer. The young hatch in summer and fall” (C ). Younger female lizards only lay one clutch of eggs a year, whereas older females lay up to four clutches of eggs per year.
Development:
Lizards do no have stages in life, and unlike humans which develop, lizards experience growth. Lizard's life cycle mainly consist of an egg, a baby lizard, a juvenile lizard, and an adult lizard.
Lizards do no have stages in life, and unlike humans which develop, lizards experience growth. Lizard's life cycle mainly consist of an egg, a baby lizard, a juvenile lizard, and an adult lizard.
http://animaldiversity.ummz.umich.edu/accounts/Sceloporus_undulatus/
http://www.herpsofnc.org/herps_of_nc/lizards/Sceund/Sce_und.html
http://genomics.senescence.info/species/entry.php?species=Sceloporus_undulatus
http://sysbio.oxfordjournals.org/content/21/4/357.abstract
http://www.petplace.com/reptiles/reptile-reproduction-from-egg-to-adult/page1.aspx
http://www.veterinarypracticenews.com/vet-dept/avian-exotic-dept/reptile-breeding.aspx
http://www.herpsofnc.org/herps_of_nc/lizards/Sceund/Sce_und.html
http://genomics.senescence.info/species/entry.php?species=Sceloporus_undulatus
http://sysbio.oxfordjournals.org/content/21/4/357.abstract
http://www.petplace.com/reptiles/reptile-reproduction-from-egg-to-adult/page1.aspx
http://www.veterinarypracticenews.com/vet-dept/avian-exotic-dept/reptile-breeding.aspx