Ksn

Question 1

erectile tissue of
the females,

Answer 1

Clitoris

Question 2

Pregnancy is counted in weeks, lasting 40 weeks from
the first day of your last period. So you are actually
only preparing for pregnancy during those first two
weeks, until ovulation. For two more weeks many
women do not know that they are pregnant, even
though they may be hoping that they conceived this
month.

Answer 2

First Trimester

Question 3

the
time of your life! Not only have most
women ceased being nauseated, many
feel a burst of energy and report feeling
the best that they’ve ever felt. Because
of the changes in the first trimester
disappearing sexuality also peaks at this
time as well for the majority of couples.
Not having to be concerned with birth
control or falling asleep as soon as your
head hits the pillow opens a whole new
realm for the couple.

Answer 3

Second Trimester

Question 4

Baby is getting bigger and loving life in the
womb. Many babies will start to settle into
a head down position, beginning as early as
the 28th week.
►About 3-4% of all babies will remain in the
breech position at the end of pregnancy.
This final trimester is really a time for
finishing touches like lung maturity and
layers of brown fat to help keep your baby
warm on the outside.

Answer 4

Third Trimester

Question 5

is the process by which the physical and mental characteristics of parents are transferred to their offspring.

Answer 5

Heredity

Question 6

sum of all hereditary material contained in a cell.

Answer 6

Genome

Question 7

segment of the DNA chain that controls the formation of a molecule of RNA.

Answer 7

Gene

Question 8

contains the hereditary information and directs reproduction of itself and the synthesis of RNA.

Answer 8

Dna

Question 9

diffuse out of the cell nucleus and carry out the critical task of protein synthesis in ribosomes located in the cytoplasm

Answer 9

Rna

Question 10

In 1953 they worked out that DNA is double helix like a twisted staircase.

Answer 10

James Watson and Francis Crick

Question 11

The process of making copies of DNA

Answer 11

Replication

Question 12

Unwinds the double helix

Answer 12

Helicase

Question 13

Synthesizes RNA primers

Answer 13

Primase

Question 14

Stabilizes single-stranded regions

Answer 14

Single strand binding protein

Question 15

Synthesizes the DNA

Answer 15

Dna polymerase 3

Question 16

Erases the primer and fills gaps

Answer 16

Dna polymerase

Question 17

Joins the ends of DNA segments; DNA repair

Answer 17

Dna Ligase

Question 18

carries the genetic information for a protein from the DNA in the nucleus to the ribosomes.

Answer 18

mRna

Question 19

translates the genetic code of the mRNA into the primary sequence of amino acids in the protein.

Answer 19

tRna

Question 20

is a structural and functional component of the ribosomes.

Answer 20

rRna

Question 21

process in which a gene’s DNA sequence is copied (transcribed) to make an RNA molecule.

Answer 21

Transcription

Question 22

The process of ending transcription

Answer 22

Termination

Question 23

The process of converting the information in a sequence of nitrogenous bases in mRNA into a sequence of amino acids that make a protein

Answer 23

Translation

Question 24

Changes in the nucleotide sequence of DNA

Answer 24

Mutations

Question 25

DNA molecule that is tightly coiled around proteins called histones,

Answer 25

Chromosome

Question 26

Changing the structure of a chromosome The loss or gain of part of a chromosome

Answer 26

Chromosome Mutations

Question 27

piece of a chromosome is lost

Answer 27

Deletion

Question 28

Chromosome segment breaks off Segment flips around backwards Segment reattaches

Answer 28

Inversion

Question 29

Occurs when a gene sequence is repeated

Answer 29

Duplication

Question 30

Involves two chromosomes that are NOT homologous Part of one chromosome is transferred to another chromosome

Answer 30

Translocation

Question 31

Failure of chromosomes to separate during meiosis Causes gamete to have too many or too few chromosomes

Answer 31

Nondisjunction

Question 32

also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. It is typically associated with physical growth delays, characteristic facial features and mild to moderate intellectual disability.

Answer 32

Down syndrome

Question 33

condition that affects only females, results when one of the X chromosomes (sex chromosomes) is missing or partially missing. Turner syndrome can cause a variety of medical and developmental problems, including short height, failure of the ovaries to develop and heart defects.

Answer 33

Turner syndrome

Question 34

occurs when a boy is born with one or more extra X chromosomes. Most males have one Y and one X chromosome. Having extra X chromosomes can cause a male to have some physical traits unusual for males such as weaker muscles, greater height, poor coordination, less body hair, and sterility

Answer 34

Klinefelter syndrome

Question 35

Change in the nucleotide sequence of a gene May only involve a single nucleotide May be due to copying errors, chemicals, viruses, etc.

Answer 35

Gene mutation

Question 36

Change of a single nucleotide Includes the deletion, insertion, or substitution of ONE nucleotide in a gene

Answer 36

Point mutation

Question 37

the result of one nucleotide substitution

Answer 37

Sickle cell disease

Question 38

Inserting or deleting one or more nucleotides Changes the “reading frame” like changing a sentence Proteins built incorrectly

Answer 38

Frameshift mutation

Question 39

mutation that exchanges one base for another

Answer 39

Substitution mutation

Question 40

The addition of one or more nucleotide base pairs into a DNA sequence

Answer 40

Insertion mutation

Question 41

A part of a chromosome or a sequence of DNA is lost during DNA replication.

Answer 41

Deletion mutation