Development And Inheritance

Question 1

The first two months, all the changes that occur in the first eight weeks after fertilization

Answer 1

Embryo (embryonic development)

Question 2

The study of events that characterize Embryonic development

Answer 2

Embryology

Question 3

Events occurring during the timeframe from nine weeks through birth

Answer 3

Fetal development

Question 4

Nine week through birth

Answer 4

Fetus

Question 5

The gradual modification of anatomical structures and physiological characteristics during the period from fertilization to maturity

Answer 5

Development

Question 6

Bar-like structures, tightly coiled chromatin,visible during cellular division, DNA recipe for every proteins in the body (entire cookbook of 46 chapters)

Answer 6

Chromosomes

Question 7

One trait of an individual (one recipe), the biological unit of heredity, code for one protein about us

Answer 7

Gene

Question 8

Chromosomes that carry the same genes and determine the same traits in a human, there are 46 chromosomes forming 23 ? pairs

Answer 8

Homologous chromosomes

Question 9

Of the 23 pairs of chromosomes present in human cells 22 pairs of them have nothing to do with the sex of the individual

Answer 9

Autosomes

Question 10

Of the 23 pairs of chromosomes present in human cells one pair determines the sex of the individual

Answer 10

Sex chromosomes

Question 11

One of the biological units of heredity that determines traits of an individual

Answer 11

Gene

Question 12

Different versions or alternate forms of a gene example blue eyes, brown eyes, green eyes, etc. often designated as being dominant or recessive

Answer 12

Alleles

Question 13

Extends from the last menstrual period until birth (280 days)

Answer 13

Gestation

Question 14

The period of early fetal development where all the major organ systems appear

Answer 14

First trimester

Question 15

A process that nears completion by the end of the six month, the fetus looks distinctively human

Answer 15

Second trimester

Question 16

The period of development characterized by the largest weight gain and most of the fetus major organ systems become fully functional

Answer 16

Third trimester

Question 17

The state of full development or complete growth, begins at birth and continues through maturity

Answer 17

Postnatal development

Question 18

Fusion of the haploid sperm with the haploid egg to produce a zygote that contains 46 chromosomes

Answer 18

Fertilization

Question 19

Releases a secondary oocyte or egg into the Fallopian tube

Answer 19

Ovulation

Question 20

The ability of the sperm to swim to the egg

Answer 20

Capacitation

Question 21

Sperm penetrating through the Corona radiata and zona pellucida, surrounding oocyte is accomplished by the release of ?

Answer 21

Hyaluronidase & acrosin

Question 22

Released contents of the oocytes into the extracellular space preventing entry of more than one sperm

Answer 22

Cortical reaction

Question 23

Large flatten cells of the blastocyst which takes part in the formation of the placenta secretes HCG to promote corpus luteum to continue secreting progesterone in order to maintain the endometrium gives rise to the chorion

Answer 23

Trophoblasts

Question 24

A cluster of small rounded cells that becomes the embryonic disk

Answer 24

Embryoblast (inner cell mass)

Question 25

When the blastocyst reach the uterus it float freely for 2 to 3 days then the trophoblast cells embed into the endometrium... this is called ?

Answer 25

Implantation

Question 26

After the trophoblast cells embed into the endometrium, then proliferate to form this type of Outer layer secreting digestive enzymes and growth factor against the endometrial surface

Answer 26

Syncytial trophoblast

Question 27

Inner layer that develops into the chorion

Answer 27

Cytotrophoblast

Question 28

Extends into the endometrium where they are in contact with maternal blood

Answer 28

Chorionic villi