The prenatal development of the organs of the fetus assume their specialized functions during the :
germinal stage
embryonic stage
fetal stage
critical stage
A medical diagnostic procedure, used by physicians to identify hereditary defects before an infant's birth that draws fluid from the sac surrounding the fetus, is called:
amniocentesis
ultrasonography
chorionic villus biopsy
fetoscopy
Fertilization actually takes place in which female reproductive structure?
Ovaries
Oviduct
Uterus
Vagina
How do gametes differ from other cells in the body?
Contain no chromatids
Contain one half the number of chromosomes that other cells have.
Contain twice the number of genes that other cells have.
Contain thrice the number of genes that other cells have.
During ejaculation, as the sperm pass out of the man's body through the penis, secretions that fuel and protect the sperm are also released from the:
Seminal vesicles and prostate gland
Androgens and prostate gland
Prostate gland and urethra
Seminal vesicles and urethra
The principal male sex hormones are:
estrogen and progesterone.
estrogen and testosterone.
testosterone and androsterone.
testosterone and semen.
What is puberty?
Partitioning of replicated chromosomes into two identical groups.
Prenatal development of the organs of the fetus.
Adults undergo the process of sexual maturation.
Reproductive cycle in the female primates.
Sex cells (sperm and ova) are called:
alleles
genes
gametes
zygotes
The newly fertilized ovum is called a :
embryo
foetus
conceptus
zygote
An absolutely essential growth process that begins within a few hours of fertilization and is a division of cells into identical cells is called:
embriosis
mitosis
endotosis
reproduction
