offspring are produced without the fusion of gametes. genetically identical to parent
offspring are produced by the fusion of gametes. not genetically identical to parents
cell containing one chromosome from each homologous pair (n)
cell containing both chromosomes from a homologous pairs (2n)
Chromosomes that are similar in size, shape, and genetic content
The pairing of replicated homologous chromosomes during prophase I of meiosis. (creates tetrads)
homologous pairs separate and are pulled to opposite poles of the cell during anaphase I of meiosis. (separates tetrads)
A paired set of homologous chromosomes, each composed of two sister chromatids.
Process in which homologous chromosomes exchange portions of their chromatids during meiosis
Cell division that produces haploid gametes
Male and female reproductive organs, responsible for production of gametes
a process by which an organism produces more organisms of the same kind
Diploid cell formed when a sperm fertilizes an egg. (a fertilized egg)
Fusion of male and female gametes.
Process by which ovum is released from an ovary
the name for the developing organism during the first eight weeks after conception.
Inner lining of the uterus
Length of time from conception to birth (pregnancy)
Male gonads that produce the male sex cells - sperm (testosterone)
Female gonads that produce the female sex cells - ovum (estrogen and progesterone)
A long, coiled duct on the outside of the testis in which sperm mature.
Duct that carries sperm from the epididymis to the urethra
Fallopian tube; tube that carries eggs from an ovary to the uterus
the womb; Female organ of reproduction used to house the developing fetus.
birth canal; A muscular, elastic passageway that extends from the uterus to the outside of the body
A muscular ring that separates the uterus and the vagina
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
External sac enclosing the testes
identical copies of a chromosome joined by a centromere
A monthly series of hormone-controlled changes that prepare the uterine lining for a pregnancy
Last phase of the menstrual cycle in which the lining of the uterus along with blood and the unfertilized ovum are discharged through the vagina.
Twins who develop from a single fertilized egg that splits in two, creating two genetically identical organisms
Twins who develop from separate eggs. They are genetically no closer than brothers and sisters, but they share a fetal environment
A structure that allows oxygen and nutrients to pass into the fetus from the mother's bloodstream and bodily wastes to pass out to the mother.
membranous duct connecting the fetus with the placenta
the term for the developing organism between the embryonic stage and birth.
death of a fetus at or after the 20th week of gestation
Death of the fetus that occurs within the first 20 weeks of pregnancy
is reduced or lost ability to conceive and carry a baby, either for a short time or forever
never having the ability to conceive and carry a baby.
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