Packet 30

Question 1

Genes with more than two alternate forms
3 different alleles of the I gene
IA, IB, or i

Answer 1

Multiple-Allele Inheritance

Question 2

alleles are codominant since both genes are expressed equally

Answer 2

A and B

Question 3

possible genotypes produce 4 blood types

Answer 3

6

Question 4

4 phenotypes of the ABO blood groups are

Answer 4

A, B, AB, O

Question 5

Traits controlled by many genes
continuous gradations ofsmall differences
body build, height andskin, hair & eye color

Answer 5

Polygenic Inheritance

Question 6

controlled by 3 genes (Aa, Bb, Cc)
person with genotype of AABBCC is dark

person aabbcc is light

parental generation & F1 and F2 generation

Answer 6

skin color

Question 7

23 pairs of chromosomes for a total of 46

• -each pair is homologous since contain similar genes in same order
• -one member of each pair is from each parent

Answer 7

somatics cells (diploid cells)

Question 8

sex chromosomes are either X or Y
females have two X chromosomes
males have an X and a smaller Y chromosome

Answer 8

22 autosomes & 1 pair of sex chromosomes

Question 9

single set of chromosomes for a total of 23

produced by special type of division: meiosis

Answer 9

gametes (haploid cells)

Question 10

Genes found only on X chromosomes

Answer 10

sex-linked inheritance

Question 11

is lack of either red or greencones, so seen as same color
XCXC is normal, XCXc is carrier
XcXc is color blind
XCY is normal, XcY is color blind

Answer 11

red-green color blindness

Question 12

is sex-linked traitwhere blood fails to clot

Answer 12

hemophilia

Question 13

result of environment effects on genetic makeup

more influential on polygenic traits such as height

Answer 13

phenotype

Question 14

cause developmental defects

Answer 14

teratogens

Question 15

fetal alcohol syndrome = slow growth, facial features, defective heart & CNS
cocaine = attention problems, hyperirritability, seizures

low birth weight, cleft lip & palate, SIDS

mental retardation, microcephaly

Answer 15

Chemicals & Drugs

Cigarette Smoking

Irradiation or radioisotopes during first trimester

Question 16

10% of reproductive age U.S. population

• –ovarian disease or obstruction of uterine tubes
• –inadequate or excessive body fat

Answer 16

female infertility

Question 17

definition is production of adequate quantities of viable, normal sperm & transport through ducts
—seminiferous ducts sensitive to x-rays, infections, toxins, malnutrition & high scrotal temperatures

Answer 17

Male Infertility

Question 18

Alternative fertilization techniques

Answer 18

fertilization in a laboratory dish

embryo transfer

gamete intrafallopian transfer

Question 19

mother given FSH to produce multiple oocytes (surgically removed)
mixed with solution containing sperm

Answer 19

in vitro fertilization

Question 20

16 cell stage placed into uterus

Answer 20

fertilization in a lab dish

Question 21

artificial insemination of oocyte donor

blastocyst transfer to infertile woman for pregnancy

Answer 21

Embryo transfer

Question 22

FSH & LH stimulate multiple oocytes—aspiration & fertilization outside the body—reimplantation into uterine tubes (whole procedure is to skip vagina)

Answer 22

Gamete intrafallopian transfer