Sexual Reproduction© Copyright NewPath Learning. All Rights Reserved. 94-4765Visit www.newpathlearning.com for Online Learning Resources.Sex Cells- Sperm and EggsMeiosis is a process that occurs in male and female reproductive organs. Meiosis forms sex cells—sperm and eggs. These cells have 23 chromosomes, half the number of chromosomes as the parent cell. eggspermspermThe ZygoteThe zygote contains all the information needed to form a new organism. Every cell of the organism descends from this original cell. FertilizationDuring sexual reproduction, a sperm fertilizes an egg, and the genetic information from the parents is combined. The fertilized egg is called a zygote, and has 46 chromosomes. Human Karyotype1236789101112131419202122XX (female)XY (male)1516171845orHumans have 46 chromosomes that are present in 23 pairs. One chromosome in each pair is inherited from the mother, and the other from the father. eggzygote(fertilized egg)zygoteblastocystembryofetussex cellsparent cellMeiosis is a process that occurs in male and female reproductive organs. Meiosis forms sex cells—sperm and eggs. These cells have 23 chromosomes, half the number of chromosomes as the parent cell. eeeeeeeeeeeeeeeggggggggggspermspermThe zyyyyyyyyyyyyyyygggggggggggotttttttttttteeeeeeeeeeee ccccccccccccccooooooooooooooooonnnnnnnnnnnnnnnnnttttttttttttaaaaaaaaaaaiiiiiiiiiiinnnnnnnnnnnssssssssssss aaaaaaaaaaaaalllll tttttttttthhhhhhhhhhhhhhhhhheeeeeeeeeeeeeee iinformmmmmmmmmmaaaaaaaaaatttttttttttiiiiiiiiiioooooonnnnnnnn nnnnnnnnnnnneeeeeeeeeeeeeeeeeeeeeeeeeeeeedddddddddddddddeddddddd tttttttttttttto form a new organism. Every cell of the organism descends frommmmmmmmm tttttttttttthhhhhhhhiiiiissssssssssss oooooooooooorrrrrrrrrrrrrriiiiiiiiiiiiiiiggggggggggggggggggggiiiiiiiiinnnnnnnnnnnnaaaaaaallllllllll cccccccccccceell. During sexual reproduction, a sperm fertilizessssssssssss aaaaaaaaaaaaaannnnnnnn eeeeeeeeeegggggggggggggggggggggggggg,,,,,, aaaaaaaaaaaaannnnnnnnnnnnnnnndddddddddddddddddd the genetic information from the parents is coooooooooooooommmmmmmmmmmmmmbbbbbbbbbbiiiiiiinnnnnnneeeeeeeeeeedddddddddddddddddd. TTTTTTTTTTTTTTThhhhhhhhhhhhhhhheeeeeeeeeeee fertilized egg is called a zygote, and has 46666666666666 cccccccccccccchhhhhhhhhhhhhhhhrrrrrrrrrrrrromooooooosssomes. 122222222223676666666668910111231313133133313131331419202122XX (female)ffXY (male)1516171845orHumans have 46 chromosomes that are present in 23 pairs. One chromosomein each pair is inherited from the mother, and the other from the father. eggzygote((((((fffffffffeeeeeeeeeeerrrrrrrrrrrtttttilized egg)zzzyyyyyggggggggggoooooooooooootttttttttttttteeeeeeeeblastocystttttttttttembryofetussex cellsslparent cell
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