LE Unit 5 - Reproduction
Terms in this set (32)
reproduction that does not involve the union of gametes and in which a single parent produces offspring that are genetically identical to the parent
A technique of prenatal diagnosis in which amniotic fluid, obtained by aspiration from a needle inserted into the uterus, is analyzed to detect certain genetic and congenital defects in the fetus.
threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next
a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape
Using a somatic cell from a multicellular organism to make one or more genetically identical individuals.
process in which homologous chromosomes exchange portions of their chromatids during meiosis
process in which cells become specialized in structure and function
sex cells that are formed in the ovaries of a women that combine with sperm to make a zygote; an egg cell only has half the amount of chromosomes a person needs, (23), the sperm holds the other half
A fertilized egg that has begun dividing into more cells
a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics;stimulates the rebuilding of the uterine lining
one of two fluid-filled tubes in human females through which an egg passes after its release from an ovary
fusion of male and female gametes also known as the egg and sperm to form a zygote, a.k.a a fertilized egg
a developed egg inside of a womens embryo after 8 weeks into her pregnancy
a haploid reproductive cell that unites with another haploid reproductive cell to form a zygote; the haploid cells are egg and sperm cells
process of reductional division in which the number of chromosomes per cell is cut in half in each gamete so the male's gamete produces half of them and the female's gamete produces the other half (each produce 23 chromosomes together the baby will have the correct amount of 46 chromosomes)
the stage of the cell cycle during which the cell's nucleus divides into two new nuclei and one copy of the dna is distributed into each daughter cell from only one parents cell. mitosis happens with only one parents cell instead of two.
the female sex glands that store the ova and produce female sex hormones (eggs) also known as the organ where eggs are produced
the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus
promotes growth of uterine lining;a hormone produced by the ovaries which acts with estrogen to bring about the menstral cycle.
external sac containing the testes
an egg or sperm cell; a sex cell carries half the number of chromosomes found in other body cells; a spermatozoon or an ovum
reproduction involving the union or fusion of a male and a female gamete; , the production of offspring through meiosis and the union of a sperm and an egg
the male's gamete that when combined with an egg cell,(the woman's gamete) produces a zygote (a fertilized egg)
the male gonads, which produce sperm and secrete male sex hormones; organ inside of a male that produces it's gamete(sperm)
the most important of the male sex hormones. Both males and females have it, but the additional testosterone in males stimulates the growth of the male sex organs in the fetus and the development of the male sex characteristics during puberty
a tube-like passageway that extends from the urinary bladder to the outside tip of the penis in the male or near the vaginal opening in the female
in the human female reproductive system, a canal that leads from the uterus to the outside of the body
a tube in the male reproductive system that forms part of the passageway for sperm cells: before ejaculation, sperm cells are stored in the epididymis, from which they travel, through the vas deferens
a fertilized egg
of a cell or organism having two sets of chromosomes or twice the haploid number
(genetics) an organism or cell having only one complete set of chromosomes
the production of gametes, this happens in the ovaries for eggs and the testes for sperm
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