Question

my assigned organism is Naked mole rat (Heterocephalus glaber). please type it.

The first step in understanding how information is passed from one generation to the next is understanding how cells divide, particularly how the DNA is passed on to the resulting cells. In this discussion, you will describe the life cycle of an animal or plant of your choosing. The animal or plant you choose must have a sexual life cycle (although it may also have an asexual life cycle). During this discussion we will focus on the processes and function of mitosis and meiosis.

You should spend approximately 3 hours on this assignment.

Instructions

1. Genes are passed to offspring from parents through both sexual and asexual reproductions. Sexual reproduction provides the opportunity for genetic exchange to take place whereas asexual reproduction on provides for the same genes that were in the parent to be passed on to the offspring. In general, sexual reproduction is a good thing for a species as it allows for genetic exchanges which typically strengthens species. Although as we saw in the first discussion of this module that is not always true.
   
   There are three general types of lifecycles.
   
   Type 1
   Haploid (1N) adult organism produces haploid gametes -> gametes from different adults fuse to form a diploid zygote ->meiosis occurs -> resulting haploid cells -> haploid adults
   
   Type 2
   diploid (2n) adult has cells that undergo meiosis to produce haploid gametes -> haploid gametes from different adults fuse ->diploid zygote -> diploid adult
   
   Type 3
   Diploid adult ->meiosis -> haploid cell (spores) -> haploid adults -> haploid adults produce gametes (sperm and egg) -> gametes fuse to produce -> diploid zygote -> diploid adult

2. For this discussion, you will be assigned an organism which may use either or both sexual and asexual reproduction in their lifecycles (see table at the end of these instructions). In your initial post you should do the following:
   • Describe this organism’s life cycle and where genetic exchange might take place in it.
   • Identify if your organisms match more of a Type 1,2, or 3 life cycle as detailed above.
   • If asexual reproduction is a normal part of this organism’s life cycle, propose why asexual reproduction might be an advantage.
   • If the organism does not have an asexual phase in the lifecycle explain why this might be an advantage for this organism.
   • If your organism has a different type of lifecycle from the expected such as males may become females, females many more than males in the population, etc., then explain what environment factors might have led to this difference.

Answer 1

Ans:

• DNA is hereditary material, transfer the information from one generation to the next generation.
• Cell is divide into two identical daughter through cycle called cell cycle.
• In somatic cells mitotic type cell division occur and form two diploid cells and in germ cells meiosis type cell division occur form four haploid cells.
• Naked mole rat is mammal.In mammals sexual reproduction take place is occur.
• they live in colony.
• only one female is produce offsprings called queen.
• gestation period is 70 days.
• queen produce new litter in 80 days and can have upto five litter per year.
• Naked mole rat life is matchde with type 2 life cycle.
• life span of mole rat is 10-30 years.