Bio question

[lor]

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Dear future Dentists,
I have the following Bio questions, please don't laugh cuz they might be too easy for you. Any help would be appreciate it!!!!!
1-In the DAT lesson book, 2nd question of the third quiz. why is the mother Cc and the fatherCC...or maybe it's not...Please explain
2-What are the two types of active transport?
3-Does oogenesis discontinue at puberty?
4-cell cycle, Are the chromosomes condensed in S?
5-I know human have 23 pairs of chromosomes...something important about gamets and # of chromosomes...

Thanks in advance!

 

[jackbauer!]

2-What are the two types of active transport? I don't know of the two types, but I do know it requires ATP, goes against the concentration gradient, and usually carries large charged molecules. Ex: Na+/K+ pump
3-Does oogenesis discontinue at puberty? No, it continues until menopause, I believe. Remember, oocytes undergo meiosis once to produce the primary oocyte....this gamete is stuck in this stage until puberty when menstruation begins. Then every 28 days the primary oocyte undergoes meiosis 2 to produce the secondy oocyte which is ready for fertilization.
4-cell cycle, Are the chromosomes condensed in S? No, prophase. Chromosomes/DNA is replicated in the S portion of interphase.
5-I know human have 23 pairs of chromosomes...something important about gamets and # of chromosomes... Gametes have 23 Chromosomes, all other cells have 46 Chromosomes (23 from mom, 23 from dad)

hope that helps.
jb!🙂

 

[Ex_EE]

2. Primary and seconday

 

[Streetwolf]

2 - Primary would be using ATP. Secondary would be some sort of double gradient where the downhill one 'fuels' the uphill one.

3 - Right answer, wrong explanation. It is halted prior to meiosis 1. During ovulation the oocyte undergoes meisos 1. If fertilized, it will undergo meiosis 2 to become the ovum.

 

[lor]

Thanks for prompt responses😀
I found the answer to the seconc question
what are the two types of active transport
Symport and anti port

Anyone can answer Q#1 please
why is CcXCC...😕
Appreciate any help on this

 

[Streetwolf]

Post the question...

 

[lor]

what is the probability that a mother who is a carrier for cystic fibrosis (an autosomal recessive disorder) will pass the diseased allele on to her child whose father is genotypically normal?

I do understand that it's Autosomal recessive therefore skips a generation but if recessive why do we say Cc for the mother
BTW, i do know how to set up for the Punnett Square so you don't need to explain that part...
Sorry, my background is Engineering and I'm new in this so please explain like you are explaining to an idiot

Thanks again!

 

[Ex_EE]

Autosomal recessive requires that a person be cc to have the disease if you are a carrier you are phenotypically normal with one normal allele C and one recessive c. Therefore, Cc for mom and CC for dad. Answer would be 50%.

For the second question the two types of active transport are primary and secondary. symport and anitport are used in secondary active transport.

If you haven't found it yet wikipedia is a good resource to answer questions like these. Here is a direct quote from that site.

Active Transport

There are two main types: primary and secondary. In primary transport, energy is directly coupled to the movement of a desired substance across a membrane independent of any other species. Secondary transport concerns the diffusion of one species across a membrane to drive the transport of another.

 

[lor]

Autosomal recessive requires that a person be cc to have the disease if you are a carrier you are phenotypically normal with one normal allele C and one recessive c. Therefore, Cc for mom and CC for dad. Answer would be 50%.

For the second question the two types of active transport are primary and secondary. symport and anitport are used in secondary active transport.

If you haven't found it yet wikipedia is a good resource to answer questions like these. Here is a direct quote from that site.

Active Transport

There are two main types: primary and secondary. In primary transport, energy is directly coupled to the movement of a desired substance across a membrane independent of any other species. Secondary transport concerns the diffusion of one species across a membrane to drive the transport of another.

Thanks for your help!