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In specialised cells in the ovary and testis, cells divide by the process of meiosis to produce gametes - VCE - SSCE Biology - Question 3 - 2003 - Paper 1
Question 3
In specialised cells in the ovary and testis, cells divide by the process of meiosis to produce gametes. A cell with a diploid number of 4 underwent meiosis. The fol... show full transcript
Worked Solution & Example Answer:In specialised cells in the ovary and testis, cells divide by the process of meiosis to produce gametes - VCE - SSCE Biology - Question 3 - 2003 - Paper 1
Step 1
Using the letters under each cell (A – F), put the cells in order commencing with the earliest stage of meiosis shown.
Answer
The order of cells commencing with the earliest stage of meiosis is: C, E, D, B, F, A. This order depicts the transition from prophase through to telophase of meiosis.
Step 2
During meiosis, crossing over and recombination occur between homologous chromosomes. Describe the outcome of recombination.
Answer
Recombination during meiosis results in genetic variation among gametes. It occurs when homologous chromosomes exchange portions of their chromatids, leading to new combinations of alleles. This process increases the genetic diversity in the offspring.
Step 3
Step 4
Explain how you reached your answer.
Answer
I determined that cell E represents anaphase 1 because during this phase of meiosis, homologous chromosomes are double-stranded and are moving towards the poles. Cell F depicts the separation of sister chromatids, which is characteristic of anaphase 2.