Fertilization

Question 1

large eosinophilic cells derived
from endoderm in the wall of yolk sac

Answer 1

Primordial germ cells

Question 2

begins at 10 to 12 weeks gestation

Answer 2

Meiotic process

Question 3

mechanism by which diploid organisms reduce their gametes to haploid state so that they can recombine again during fertilization to become diploid

Answer 3

Meiosis

Question 4

mechanism by which genetic exchange is
completed through chiasma formation & crossing over
(recombination) between homologous chromosome
pairs

Answer 4

Meiotic process

Question 5

chromosome condensation and linearization, and the chromatin is seen as a fine, stringlike structure.
Appearance of synaptonemal complex

Answer 5

Zygotene

Question 6

most easily recognizable period of
prophase, characterized by clearly defined chromosomes that appear as continuous ribbons of thick beadlike chromatin;

Answer 6

Pachytene

Question 7

constitute majority of 3rd trimester fetal & newborn ovaries

2 homologous chromosomes pull away from each other; bivalents held together at centromere

Answer 7

Diplotene

Question 8

Associated with deficient formation of chiasma
between homologous chromosomes associated with
DNA crossover (recombination) sites

Answer 8

Aneuploidy

Question 9

Associated with deficient formation of chiasma
between homologous chromosomes associated with
DNA crossover (recombination) sites

Answer 9

Aneuploidy

Question 10

After fertilization the zygote (fertilized egg) has diameter

Answer 10

83-105 um