midterm2

TRUE OR FALSE ) In animals cells, cytoplasmic division is done by furrowing.

TRUE OR FALSE 2) Nuclear membrane begins to break down in prophase.

TRUE OR FALSE 3) Chromosomes are at their maximum condensation in telophase.

TRUE OR FALSE 4) Random alignment of the homologous chromosomes happens at metaphase I. __T__

TRUE OR FALSE 5) There are two nuclear divisions in mitosis and one nuclear division in

TRUE OR FALSE 6) Mitosis and cytokinesis give rise to two clones (genetically identical cells).

TRUE OR FALSE 7) A human primary oocyte can give rise to only one viable egg.

Sister-chromatids are lined up at the equator of the spindle at:

a) metaphase stage of mitosis    
b) anaphase stage of mitosis
c) telophase stage of mitosis
d) prophase stage of mitosis

Chromosomes are duplicated in:
a) prophase
b) the G1 stage of interphase
c) the S stage of interphase
d) the G2 stage of interphase

Crossing over    
 a) takes place during prophase I stage of meiosis
b) happens between the nonsister chromatids
c) produces variety in the genetic make up of the gametes
 d) all of the above

TRUE OR FALSE Adipose tissue cells are filled with lipids.

TRUE OR FALSE. Glial cells conduct nerve impulses while neurons support the glial cells.

TRUE OR FALSE. Endocrine glands produce and release hormones.

TRUE OR FALSE. In negative feedback, the stimuli are intensified several folds before homeostasis is

TRUE OR FALSE. The walls of the stomach are lined with skeletal muscle tissue

TRUE OR FALSE. Collagen and elastin are typically found in connective tissue

TRUE OR FALSE. The function of simple squamous is diffusion.

TRUE OR FALSE. Simple columnar epithelium is found in the lining of gut and respiratory tract.

TRUE OR FALSE. The outer layer of skin is consisted of simple epithelium.

Striated and involuntary muscle                            a. cardiac muscle                                                                                      b. skeletal muscle                                                                                       c. smooth muscle

Glands are derived from:
a) muscle tissue
b) connective tissue
c) epithelial tissue
d) cartilaginous tissue

. _a___ is a specialized connective tissue that contains chondrocytes.

a) cartilage
b) muscle
c) bone
d) blood

Tendons and ligaments consist of:
a) loose connective tissue
 b) dense connective tissue
c) cartilage
d) bone

A heat-sensitive neuron in your skin is an example of a:
a) sensory receptor
b) effector
c) promotor
d) integrator

T/F 1. An XO woman is fertile.

T/F 2. Human males determine the gender of the offspring.
True False

T/F 3. Charcot-Marie-Tooth disease is an X-linked dominant trait.
True False

T/F 4. XYY males are fertile.
True False

T/F 5. Nondisjunction at anaphase I or anaphase II frequently results in aneuploidy.
True False

A hemophiliac woman has offspring with a normal man. What are the chances of
   hemophilia occurring in their children?
a) 75%                                        
 b) 50% 
c) 25%
d) 0%

hemophilia

Klinefelter syndrome

cystic fibrosis

deletion

Turner Syndrome

Down’s Syndrome

SRY gene is located on

presence of three or more of each type of chromosome in gametes or somatic cells.

T/F) A homozygote has a pair of identical alleles whereas a heterozygote has a pair of nonidentical alleles.
True False

T/F 2) Pink color of flowers produced by snapdragon plants is an outcome of incomplete

T/F 3) If a woman’s genotype at the ABO locus is IA i, her blood type is O.
True False

T/F 4) Pleiotropy refers to traits which are resulted from multiple genes.
True False

T/F 5) AB blood type is an outcome of co-dominance.
True False

T/F 6) Breast cancer is a sex-limited trait.
True False

T/F 7) Mendel performed dihybrid crosses to test his theory of independent assortment.
True False

T/F 8) Most of human traits are multifactorial traits.
True False

In a paternity suit, a woman with type AB blood accuses a man with type O blood of

   fathering her child. The child has type AB blood. Could the man be the child’s father?
a) yes
 b) no

The F2 phenotypic ratio of Mendel’s monohybrid cross is
a) 1:1
b) 2:1
c) 9:3:3:1
d) 1:2:1
e) 3:1

Gregor Mendel discovered:
a) chromosomes
b) tertiary structure of proteins
c) the theory of independent assortment
d) the theory of natural selection

The phenotype of an organism:
a) are the traits of that organism
b) is affected by the environment
c) is affected by its genotype
d) all of the above

Offspring of the cross AA* aa are:
a) all AA
b) all aa
c) all Aa
d) 1/2 aa and 1/2 AA

The F2 phenotypic ratio of Mendel’s dihybrid cross is
a) 1:1
b) 2:1
c) 9:3:3:1
d) 1:2:1
e) 3:1

The F2 genotype ratio of Mendel’s monohybrid cross is
a) 1:1
b) 2:1
c) 9:3:3:1
d) 1:2:1
e) 3:1