LIFE-SPAN DEVELOPMENT
COMPREHENSIVE EXAMINATION GUIDE
2026 COMPLETE QUESTIONS AND
ANSWERS
◉ Meiosis.
Answer: Cell division of gametes, sex cells egg and sperm, producing
23 unpaired chromosomes. Haploid cells (n)
The process through which gametes (sperm and ova) are produced,
in which each resulting gamete has half of the genetic material of the
parent cell.
◉ Dominant genes.
Answer: one gene of a pair always exerts its effects; overrides the
potential influence of the other gene.
◉ Recessive genes.
Answer: exerts its influence only if two genes of a pair are both
recessive. If inherit a recessive gene for a trait from BOTH parents,
the trait will be shown.
◉ Gestation.
, Answer: Time frame of Conception to Birth. lasts 280 days from
mom's last period.
◉ Fertilization.
Answer: Fusion of sperm 23 chromosomes (n) with egg 23
chrosomes (n) to make a Zygote
◉ Zygote.
Answer: Fertilized egg by one sperm penetrating into the egg.
◉ Implantation.
Answer: the embedding of the blastocyst in the uterine wall, takes
place in the second week after conception
◉ Embryonic Period.
Answer: Weeks 2-8 of prenatal development
◉ Embryo - 3 layers.
Answer: Ectoderm - outer layer, skin, sense organs, nervous sys
Mesoderm - middle layer, muscles, bone, circulatory system, and
mesentery organs
Endoderm - inner layer, digestive system, lungs, glands
COMPREHENSIVE EXAMINATION GUIDE
2026 COMPLETE QUESTIONS AND
ANSWERS
◉ Meiosis.
Answer: Cell division of gametes, sex cells egg and sperm, producing
23 unpaired chromosomes. Haploid cells (n)
The process through which gametes (sperm and ova) are produced,
in which each resulting gamete has half of the genetic material of the
parent cell.
◉ Dominant genes.
Answer: one gene of a pair always exerts its effects; overrides the
potential influence of the other gene.
◉ Recessive genes.
Answer: exerts its influence only if two genes of a pair are both
recessive. If inherit a recessive gene for a trait from BOTH parents,
the trait will be shown.
◉ Gestation.
, Answer: Time frame of Conception to Birth. lasts 280 days from
mom's last period.
◉ Fertilization.
Answer: Fusion of sperm 23 chromosomes (n) with egg 23
chrosomes (n) to make a Zygote
◉ Zygote.
Answer: Fertilized egg by one sperm penetrating into the egg.
◉ Implantation.
Answer: the embedding of the blastocyst in the uterine wall, takes
place in the second week after conception
◉ Embryonic Period.
Answer: Weeks 2-8 of prenatal development
◉ Embryo - 3 layers.
Answer: Ectoderm - outer layer, skin, sense organs, nervous sys
Mesoderm - middle layer, muscles, bone, circulatory system, and
mesentery organs
Endoderm - inner layer, digestive system, lungs, glands
