PPT-Fertilization Prof Dr.

Hekmat El Gammal 2018 Lecture 5 Lecture Objectives This lecture contains information that should enable you to do the following Define fertilization and state its functions and events State recognition of egg and sperm. Genetic Variability. You Must Know. The importance of crossing over, independent assortment and random fertilization . to increasing genetic variability.. Mutations (changes in an organism’s. DNA) are the original source of genetic diversity. . Fertilization . – Union of 2 parent cells.. Sperm and egg cells called . gametes. .. Product of egg . +. sperm = fertilized egg = . zygote. .. . Embryo. = early stages of an organism’s development; from first cell division to end of 8. Maleness induced by hormones from the developing testis.. Reproduction. “Indifferent” ducts . of embryo. Y chromosome . present. Y chromosome . absent. penis. testis. ovary. uterus. vagina. Male.  . Gene transfer, asexual reproduction, sexual reproduction, and apomixis . viachicago.wordpress.com. t. inyfarmblog.com. b. irdsandbloomsblog.com. Asexual reproduction. . The clone is immortal . Example: . Main Idea: Animals have specialized structures for sexual reproduction.. Gonads-specialized reproductive organs that produce sperm or eggs. Ovaries produce egg cells . Testes produce sperm. Female. Male. Type Influences C . Allocation and N Acquisition in Moist Tundra in Response . to N Fertilization, P Fertilization, . and . Warming. Erik . Hobbie. 1. , Laura Gough. 2. , Sarah Hobbie. 3. , Gaius Shaver. The reason that two sperm cells travel down the angiosperm pollen tube is that . they both stimulate growth of the pollen tube.. one fertilizes the egg, and the other combines . with the two polar nuclei.. PUBERTY, DRAWING Puberty. Illustration of the changes observable at puberty in both boys and girls (genitals, weight and height, secondary sex characteristics and other characteristics . developped. specifically due to the secretion of testosterone in boys and estrogen in girls.. (Historical viewpoints). Wak. . Wak. tree. Homunculus . (. latin. : little man). Gametes . – meet the parents . . 2. 0. oocyte . (. oo. = egg . cyt. = cell). sperm. Conception . – beginning of a journey. Chapter 8. ©2008 McGraw-Hill Companies. All Rights Reserved.. 2. What is the approximate annual cost of raising a child born today?. A. $5000. B. $8000. C. $12,000. C. According to the U.S. Dept. of Agriculture, it costs more than $12,500 per year (on average) to raise a child born n 1995 to the age of 2. The cost jumps every 2 to 3 years. It will cost more than $250,000 (on average) to raise a child to age 18.. Amanda Porter. WHAT IS IN VITRO FERTILIZATION (. ivf. )?. Process used to treat infertility. Egg and sperm combined in laboratory. Once embryo(s) formed, placed in uterus. Complex and expensive procedure. Functions of Flower Parts 1. Petal-. Petals are used to attract insects into the flower, they may have guidelines on them and be scented. . Stigma-. . Is covered in a sticky substance that the pollen grains will adhere to. . PARENTS, AND PEDIATRICS MARISA PACELLA , MD FELLOW LECTURE JANUARY 28, 2016 CASE  Full term, singleton female  CHOP NICU for hypoglycemia, hyperinsulinism  Consulted CHOP Genetics  His Medical treatment which helps infertile couples to have baby.. Used for the first time in United States in 1981.. More than 4 million babies have been born.. First test tube baby born in England on 25 july,1978 named Louise Brown. .