Lecture 14

Question 1

What is Binary Fission

Answer 1

How single cell organisms asexually reproduce

Question 2

What are the main stages of the sexual cycle

Answer 2

the haploid gamete (n=23 egg and sperm)
Fertilization - makes diploid zygote 2n=46
mitosis and development - multicellular diploid adult (2n=46a)
testies and ovarys - meiosis

Question 3

Why is meiosis important for the number of chromosomes in gametes

Answer 3

because if gametes were produced by mitosis, 2n the embryo would be 4n
meiosis halves no. of chromosomes in gametes, diploid-2n

Question 4

How does meiosis lead to gametic and zygotic in diversity

Answer 4

through:
independent assortment of chromosomes (random combinations)
crossing over (and synapsis of chromatids)
random fertilization of gametes