Key Terms And Definations

Question 0

Chorionic villi

Answer 0

Tiny vascular protrusions on the chorionic surface that project into the maternal blood sinuses of the uterus and that help form the placenta and secrete human chorionic gonadotropin.

Question 1

Blastocyte

Answer 1

Stage in development of a mammalian Embro, occurring after the morula stage, that consist of an outer layer, or trophoblast, and a hollow ball of cells enclosing a cavity

Question 2

Chromosome

Answer 2

Elements within the cell nucleus carrying genes and composed of deoxyribonucleic acids and proteins.

Question 3

Conception

Answer 3

Union of the sperm and ovum resulting in fertilization; formation of the one spelled zygote.

Question 4

Decidua basalis

Answer 4

Maternal aspect of the placenta made up of uterine blood vessels, endometrial stroma, and glands that shed the lochial discharge after birth.

Question 5

Embryo

Answer 5

Conceptus from day 15 of development until approximately eight weeks after conception.

Question 6

Fertilization

Answer 6

Union of an ovum and a sperm.

Question 7

Fetal membranes

Answer 7

Amnion and chorion surrounding the fetus.

Question 8

Fetus

Answer 8

Developing human in utero from approximately the ninth week after conception until birth.

Question 9

Gamete

Answer 9

Mature female or male germ cell; the mature sperm or ovum.

Question 10

Genetics

Answer 10

Study of single gene or genes sequences and their effects on living organisms.

Question 11

Genome

Answer 11

Complete copy of genetic material in an organism

Question 12

Genomics

Answer 12

Study of the entire DNA structure of all of an organisms genes, including functions and interactions of genes.

Question 13

Implantation

Answer 13

Embedding of the fertilized ovum in the underline mucosa,; nidation.

Question 14

Karyotype

Answer 14

Schematic arrangements of the chromosomes within a cell to demonstrate their number and morphological features.

Question 15

Lanugo

Answer 15

Very fine hairs that appear first at 12 weeks and by 20 weeks cover the entire body of the fetus.

Question 16

Meiosis

Answer 16

Process by which germ cells divide and decrease their chromosomal numbers by one half.

Question 17

Mitosis

Answer 17

Process of somatic cell division in which a single cell divides, but both of the new cells have the same number of chromosomes as the first.

Question 18

Monosomy

Answer 18

Chromosomal aberration characterized by the absence of one chromosome from the normal diploid complement.

Question 19

Morula

Answer 19

Developmental stage of the fertilized ovum characterized by a mass of cells resembling a mulberry.

Question 20

Mosaicism

Answer 20

Condition in which some somatic cells are normal, whereas others show chromosomal aberrations.

Question 21

Nutrigenetics

Answer 21

Study of the effects of genetic variations on diet and health with the implications for susceptible subgroups.

Question 22

Nutrigenomics

Answer 22

Study of the effects of nutrients on health through alteration of Genome, proteome and metabolome and noting change in physiologic features that result.