Biology Answers

Following tetrads are observed in yeast crosses involving three pairs of  heterozygous genetic markers (A/a; B/b) (C/c; D/d) (E/e; F/f): 

Cross I (A/a; B/b) Cross II (C/c; D/d) Cross III (E/e; F/f) AB Ab CD CD EF Ef EF AB Ab CD Cd EF Ef Ef ab aB cd cD ef eF eF ab aB cd cd ef eF ef 

---- ----- ------ ----- ---- ----- ----  95 90 50 20 80 5 20  

What is the genetic map distance (in cM or M) between the two pairs of loci in each of the  three crosses?

The key difference between hearing aid and

cochlear implant is that [Best answer ]

A.

the hearing aid codes the sound into electrical

pulses.

B.

the hearing aid directly stimulates the auditory

nerves in the cochlea.

C.

the cochlear implant codes the sound into

electrical pulses.

D. the cochlea uses a speaker to stimulate the ear.

Electrocardiogram (ECG) is [Best answer ]

A. generated by the nerve cells in the heart.

B. independent of rhythm of the heart

contraction.

C.

measured on the body surface, providing a

non-invasive diagnosis tool for heart disease.

The most significant differences between axon of

neuron and electric cable is that [ Best answer]

A. the axon attenuates the electric signal whereas

electric cable does not.

B. the axon and electric cable propagate electric signal

at the same speed.

C. the axon propagates electric signal at constant

amplitude at lower speed than in electric cable.

D. the axon propagates electric signal at constant

amplitude at same speed as in electric cable.

state Wien displacement law

Climate Change refers to changes in the long-term regional (or even global) average of temperature, humidity, and precipitation over seasons, years, or decades. Are Climate Change and Global Warming the same thing? Your stance on climate change and why you believe climate change is or is not occurring. Provide evidence from sources that support your opinion (check out climate.nasa.gov).

a)    What type of glycosidic bond, disaccharide below contains: Fill in the blanks ___(___→___).

Albinism, the total lack of pigment, is due to a recessive gene. A man and woman plan to marry and wish to know the probability of their having any albino children. What are the probabilities if: 

1.     both are normally pigmented, but each has one albino parent. 

2.     the man is an albino, the girl is normal, but her father is an albino. 

3.     the man is an albino and the girl's family includes no albinos for at least three generations.

what is eukaryotes

2. A patient is reported with low blood pressure.  

Briefly or diagrammatically explain the renal response to  

this condition. Explain the involvement of important  

hormones in the process.