different between prophase and prophase 1
Answers
Answer:
Chromosomes condense and the centrosomes begin to form an early spindle. Meiotic prophase I is much longer that mitotic prophase. During prophase I homologous chromosomes make contacts with each other called chiasmata and “crossing over” occurs. This is where chromosomes exchange sections of DNA.
Answer:
Prophase of mitosis
(i) It is a short phase and is not divided into any sub phase.
(ii) Pair formation in between homologous chromosomes does not occur as there is no attraction between than.
(iii) Chiasma is not formed.
(iv) Crossing over does not occur.
(v) Part exchange does not occur in the chromosome. So gene arranges not remains unchanged.
Prophase-1 of meioses
(i) It is a long phase and is divided into the sub phases.
(ii) Pair formation (synapsis) due to attraction occurs in between homologous chromosomes.
(iii) Chiasma is formed.
(iv) Crossing over occurs.
(v) Part exchange occurs, which changes the gene arrangement of the chromosomes.
hope this was useful.