Genetics and Developmental Biology

help major bio problem!!!?

help major bio problem!!!?

what are the types of RNA present in the cytoplasm of a cell? is it 18 S RNA, 28 S RNA and 5 S RNA?
if so which one have a higher concentration than the other in the cytoplasm and which on have the highest molecular weight?

bulgaria   237   2 Replies

ton

Human Genome Project?

Human Genome Project?

biology question

- influence of human gentic code on the future of our species

Tonbon1221   332   1 Reply

toorpool

Evolution: Where's the proof?

Evolution: Where's the proof?

So, I'm a new Christian. I was debating evolution with someone in my Church who thinks evolution is a myth!!! I assumed Christians had already resolved this, but apparently there are still those who grasp at the literal translation of the Bible. She

bugaian   544   13 Replies

tonesack

Why is DNA important?

Why is DNA important?

why is DNA important???

doin a research paper.

any one know???

bulgaria   221   4 Replies

Fevn

Creation of CFTR Knockout Mice by Injection of KO ES Cells into a Blastocyst

Creation of CFTR Knockout Mice by Injection of KO ES Cells into a Blastocyst

I am not sure if I am understanding this slide correctly, but what I got thus far is that a KO mouse is generated by injecting the blastocyst with the heterozygous ES cells resulting in a chimeric individual which contains both wild type & hetero

willuhelp   833   1 Reply

duddy

Creation of CFTR Knockout Embryonic Stem Cells by Positive-Negative Selection

Creation of CFTR Knockout Embryonic Stem Cells by Positive-Negative Selection

i am having a tough time grasping this slide and the overall concept, if anyone can clearify this for me it would help me so much

willuhelp   750   3 Replies

nite_n_day

Identifying a missense mutation (Mastering Genetics)

Identifying a missense mutation (Mastering Genetics)

I had trouble identifying the missense mutation.

azn_girl254   902   2 Replies

dnme94

Masteringgenetics

Masteringgenetics

I had trouble identifying the frameshift mutation,

azn_girl254   536   1 Reply

barry

Is this sentence correct or not

Is this sentence correct or not

Some transfer rna can regognise more than one amino acid

Also is that got anything to do with the degeneracy of genetic material

Oliver   651   7 Replies

bio_man

Hardy Weinberg & X-Link Recessive HW Help Please

Hardy Weinberg & X-Link Recessive HW Help Please

1. In a group of 500 people, the frequency of genotype NN is 40%. How many individuals would you expect to have the MN genotype?

A. 232
B. 300
C. 200
D. 68
E. 258

2.. If an X-linked recessive trait has a freq

willuhelp   346   1 Reply

barry

what would hapen to the development of a dividing embroyonic mass if cells...

what would hapen to the development of a dividing embroyonic mass if cells...

what would happen to the development of a dividing embryonic mass if cells in the spinal ectodermal ridge were removed?

caty12845   374   1 Reply

doseofmegan

How to Interpret and Fill in Southern Blot Graph

How to Interpret and Fill in Southern Blot Graph

Would 2 lines for the southern graph portion indicate a moderate insulin mRNA expression? I'm having such a tough time

willuhelp   549   1 Reply

soufieno

Creation of CFTR KO Embryonc Stem Cells by Positive-Negative Selection/KO Mice

Creation of CFTR KO Embryonc Stem Cells by Positive-Negative Selection/KO Mice

I am really having a tough time grasping these concepts.  Attached is 2 of the slides.

willuhelp   554   2 Replies

willuhelp

Creation of CFTR Knockout Mice by Injection of KO ES Cells into a Blastocyst

Creation of CFTR Knockout Mice by Injection of KO ES Cells into a Blastocyst

I'm really having a tough time with this KO mouse concept. If anyone could explain what is going on in each step, this would really help me.

willuhelp   423   N/A

willuhelp

Creation of CFTR Knockout Embryonic Stem Cells by Positive-Negative Selection

Creation of CFTR Knockout Embryonic Stem Cells by Positive-Negative Selection

I am having trouble understanding what is going on here. What I got thus far is that the more preferred fate is Homologous recombination (targeted approach). Next, you basically plate the ES cells that are both neomycin & ganciclovir resistant (h

willuhelp   369   N/A

willuhelp

what role does the fetus play in triggering parturtionn and describe the hornmon

what role does the fetus play in triggering parturtionn and describe the hornmon

what role does the fetus play in triggering parturition and describe the hormonal events surrounding parturition.

Post Merge: 10 years ago

parturition is trigger by fetus releasing cortisol into matern

caty12845   492   1 Reply

savio

why are LH ad FSH levels elevated in mennopausal females?

why are LH ad FSH levels elevated in mennopausal females?

why are LH ad FSH levels elevated in menopausal

females?

Post Merge: 10 years ago

The levels of FSH and LH are usually controlled by negative feedback by high levels of estrogen and proge

caty12845   343   1 Reply

savio

Although whole-genome duplications that result in polyploidy are fairly common in plant species...

Although whole-genome duplications that result in polyploidy are fairly common in plant species...

Although whole-genome duplications that result in polyploidy are fairly common in plant species, which of the following are common in other eukaryotes?

segmental duplications of small gene regions
    duplication of whole chromosome arm

dnme94   1222   1 Reply

savio

Mastering Genetics Variation to the Insulin Promoter Diagram (How to Read)

Mastering Genetics Variation to the Insulin Promoter Diagram (How to Read)

The filled in boxes are given, objective is to match color to color. I am having a horrible time trying to decipher this 

willuhelp   458   1 Reply

savio

what would happen to the development of a dividing embroyonic mass if....several

what would happen to the development of a dividing embroyonic mass if....several

what would happen to the development o a dividing embryonic mass if several pluripotent cells were removed?

caty12845   344   1 Reply

savio

what is coolostrum and what are the major contributions to the infant?

what is coolostrum and what are the major contributions to the infant?

what is colostrum and what are the major contributions to the infant?

caty12845   292   1 Reply

savio

what would happen to the development of a dividing embryonic mass if

what would happen to the development of a dividing embryonic mass if

what would happened to the development of a dividing embryonic mass if several pluripotent cells were removed? 

caty12845   321   1 Reply

savio

the cessation of ovulation and menses for an entire year is called

the cessation of ovulation and menses for an entire year is called

the cessation of ovulation and menses for an entire year is called....

caty12845   1406   2 Replies

caty12845

the thin fold of muscoa that partially closes the distal end of the vagina..

the thin fold of muscoa that partially closes the distal end of the vagina..

the thin fold of mucosa that partially closes the distal end of the vagina before the first experience of sexual intercourse is called the ......

caty12845   926   1 Reply

sci_expert

the early stage of embroyonic development during which rapid mitotic cell

the early stage of embroyonic development during which rapid mitotic cell

the early stage of embryonic development during which rapid mitotic cell divisions occur as the zygote travels down the uterine tube is called .....

caty12845   678   1 Reply

ivanna

burrowing of the fertilized egg into the endometrium lining of the uterus is

burrowing of the fertilized egg into the endometrium lining of the uterus is

burrowing of the fertilized egg into the endometrium lining of the uterus is called

caty12845   1176   1 Reply

biolove

Preventing birth is called....

Preventing birth is called....

preventing birth is called ,......?

caty12845   339   1 Reply

sci_expert

bio 30 help! please

bio 30 help! please

1) when the tRNA anticodons match mRNA triplet codons, then the amino acid sequence synthesized is?
2) is this sequence the same as the order of amino acid in hemoglobin illustrated in the beginning of this exercise?

hemoglobin )&nbs

dil   761   1 Reply

sarah!

If two offspring result from the cross Zz X Zz,what is the probability that both

If two offspring result from the cross Zz X Zz,what is the probability that both

If two offspring result from the cross Zz X Zz, what is the probability that both will have the same genotype ZZ?

A) 1/16
B) 1/4
C) 1/2
D) 1/8
 I think its B, but i'm not quite sure.

wutever22   1715   3 Replies

bio_man

what might hershey and chase have concluded if they had found 32p and 35s in the bacterial cells?

what might hershey and chase have concluded if they had found 32p and 35s in the bacterial cells?

Please help.

ferretsgo   603   1 Reply

rockman3192

What contributions did Griffith, Miescher, Delbruk & Luria, Chargaff, Watson & Crick, Hershey + chase make?

What contributions did Griffith, Miescher, Delbruk & Luria, Chargaff, Watson & Crick, Hershey + chase make?

What about Meselson.

How would you list and explain the order of these contributions in terms of their importance to genetics?

nurse1828   289   1 Reply

fahmesauda

How did Hershey & Chase's show that DNA is genetic info? Thanks for any help.?

How did Hershey & Chase's show that DNA is genetic info? Thanks for any help.?

Studying for finals tomorrow, can't find this in my notes.

Any help is appreciated.

rist789   396   1 Reply

$abood$

Describe the difference between the experiments of Griffith and Avery, MacLeod and McCarty, and Hershey &Chase?

Describe the difference between the experiments of Griffith and Avery, MacLeod and McCarty, and Hershey &Chase?

Describe the difference between the experiments of Griffith and Avery, MacLeod and McCarty, and Hershey &Chase?

jtmugs11   457   1 Reply

irina

What did Hershey and Chase conclude from their experiments with viruses and bacteria?

What did Hershey and Chase conclude from their experiments with viruses and bacteria?

What did Hershey and Chase conclude from their experiments with viruses and bacteria?

Rj123   361   2 Replies

buzzhitt

a Hershey and Chase experiment question, plz?

a Hershey and Chase experiment question, plz?

Using radioactive tracers to determine the interactions of bateriophages and their host bacteria,  Hershey and Chase demonstrated without question that:
a. genes are composed of protein molecules
b. DNA and proteins are actually the same molecules lo

ferretsgo   369   4 Replies

fat_trel

Are there any experiments that can 100% prove that DNA is the molecule that carries genetic information?

Are there any experiments that can 100% prove that DNA is the molecule that carries genetic information?

Hershey and Chase experiment and the like point to DNA as the molecule that carries genetic information, but there could have been contaminations of protein and/or RNA since DNA came originally from a biological source(cells).

FasN8me5   254   3 Replies

lexibop383

In the Hershey and Chase Experiment, why was a kitchen blender used?

In the Hershey and Chase Experiment, why was a kitchen blender used?

What would be the difference between using a centrifuge or a blender?

caddy85r   226   1 Reply

ring5303

In the Hershey-Chase experiments what result showed that DNA is the genetic material?

In the Hershey-Chase experiments what result showed that DNA is the genetic material?

a. The phage DNA labeled with radiolabeled 32P was found in the liquid medium.

 b. The phage DNA labeled with radiolabeled 35S was found inside the bacterial cell.

 c. The phage capsid protein labeled with radiolabeled 32P was found inside the bact

buzzisgay   296   1 Reply

remota

What did Hershey and Chase?s work show?

What did Hershey and Chase?s work show?

Genes are made of both DNA and protein.
Genes are probably made of DNA.    
Genes are probably made of protein.
Bacteria contain DNA but not protein.
Viruses contain DNA but not protein.
Thanks!

ring5303   472   1 Reply

memandie1

describe the contributions of hershey and chase to the understanding of DNA is the hereditary molecule in viru?

describe the contributions of hershey and chase to the understanding of DNA is the hereditary molecule in viru?

state how watson and crick were able to build a structural model of DNA?

please help! thank you!

ohjojho   417   1 Reply

ohm8274