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BEST ANSWER GETS 10 POINTS

769

10

271

385

Genetic expression is affected by

1. other genes.

2. non-genetic factors inside the body (e.g., hormones).

3. the outside environment.

4. All of these statements are true.

is it 4??

Place the following events in order, starting with the first. 1- 10

ACh binds to ligand gated channels 1.

Actin binding sites are exposed 2.

. An action potential is sent along the sarcolemma 3.

The myosin head releases from actin 4.

Neuron releases ACh into the synaptic cleft. 5.

The sarcoplasmic reticulum releases calcium 6.

Na rushes into the muscle cell 7.

. Troponin alters its shape moving tropomyosin with it 8.

Calcium binds to the troponin 9.

The myosin head attaches to actin 10.

help pleaseee.

One applies antiperspirant to the ____ region and wears a bracelet around the ___region.

what??? im confused !! ^^

or how about this one muscles are what to the skin??

distal?

1. phosphate group

2. named base

3. amino acid

4. sugar

5. ATP

can be more than one answer. i know sugar and phosphate are right

The membranes that surround most of the organs of the ventral cavity are known as ?

muscles are what to the skin?

A patient comes into the emergency room. He is bleeding from the left proximal femoral region (medial and posterior) and the left lumbar abdominopelvic region (also posterior). At first glance, there appears to be bullets lodged in the wounds. Explain where his wounds are in layman's terms and what organs may be injured.

The tails of the phospholipids are oriented toward the ____ while the heads are oriented in towards the _____ and out towards the ____ ?

Im confused :(

1. A woman who does not carry the color-blindness allele has children with a man who is color blind.

What proportion of their children will be color blind?

A) 3/4 B) all C) 1/4 D) 1/2 E) none

its 1/2 right?

2. What is the connection between sickle-cell anemia and malaria? 6)

A) Heterozygotes for sickle-cell anemia have some resistance to malaria.

B) Both are dominant.

C) Both are autosomal recessive.

D) Heterozygotes for malaria have some resistance to sickle-cell anemia.

E) Both are X-linked.

3. What is one difference between polyploidy and aneuploidy? 8)

A) Polyploidy is one extra chromosome; aneuploidy is one missing chromosome.

B) Polyploidy causes diseases and disorders in humans, aneuploidy does not.

C) Polyploidy is extra sets of chromosomes; aneuploidy does not increase by a full set.

D) Polyploidy is extra sex chromosomes; aneuploidy is extra autosomes.

E) Humans can be viable as polyploids but not as aneuploids

4. What are the characteristics of the human sex chromosomes? 12)

A) Y chromosomes are smaller in size.

B) The X chromosome carries genes required by both males and females.

C) Y chromosomes carry genes required by males only.

D) X chromosomes are larger in size.

E) All the above statements are true

5. The term for having one extra or one fewer chromosome than the standard diploid set is

6.Watson and Crick: 18)

A) were unaware that others were also seeking the structure of DNA.

B) relied heavily on the experimental results of others.

C) were hired by laboratories specifically to study DNA.

D) did extensive experimentation.

E) had strong evidence that DNA was a protein.

1. A woman who does not carry the color-blindness allele has children with a man who is color blind.

What proportion of their children will be color blind?

A) 3/4 B) all C) 1/4 D) 1/2 E) none

its 1/2 right?

2. What is the connection between sickle-cell anemia and malaria? 6)

A) Heterozygotes for sickle-cell anemia have some resistance to malaria.

B) Both are dominant.

C) Both are autosomal recessive.

D) Heterozygotes for malaria have some resistance to sickle-cell anemia.

E) Both are X-linked.

3. What is one difference between polyploidy and aneuploidy? 8)

A) Polyploidy is one extra chromosome; aneuploidy is one missing chromosome.

B) Polyploidy causes diseases and disorders in humans, aneuploidy does not.

C) Polyploidy is extra sets of chromosomes; aneuploidy does not increase by a full set.

D) Polyploidy is extra sex chromosomes; aneuploidy is extra autosomes.

E) Humans can be viable as polyploids but not as aneuploids

4. What are the characteristics of the human sex chromosomes? 12)

A) Y chromosomes are smaller in size.

B) The X chromosome carries genes required by both males and females.

C) Y chromosomes carry genes required by males only.

D) X chromosomes are larger in size.

E) All the above statements are true

5. The term for having one extra or one fewer chromosome than the standard diploid set is

6.Watson and Crick: 18)

A) were unaware that others were also seeking the structure of DNA.

B) relied heavily on the experimental results of others.

C) were hired by laboratories specifically to study DNA.

D) did extensive experimentation.

E) had strong evidence that DNA was a protein.

two people with polydactyly have a normal child. if they have another child what is the probability it will also have the normal number of fingers and toes??

why cant a male with normal vision be a carrier of the allele for color blindness?

help please

which genetic disorder can only result from nondisjunction of sex chromosomes during spermatogenesis? why?

is it turner or klinefelter?

______________ of chromosome number and generation of ___________ are significant events of Meiosis

a) Oxidation, Current

b) Reduction, Food

c) Reduction, Diversity

d) Counting, Controversy

Chromosome number is doubled during :

a. Prophase and Metaphase of Mitosis

b. Anaphase and Telophase of Mitosis

c. Meiosis 1

d. G1 interphase