Question

q3. draw a cell with chromosomes showing the homologous pairs for chromosomes 4, 5, and 6 for the plant with the genotype rw bb g2g3 during metaphase i of meiosis. clearly label all alleles for all genes. label the sister chromatids and homologous chromosomes if they are present. also answer the following with regards to the cells drawn in q3: q4. is the dna replicated or unreplicated? q5. is the cell diploid or haploid? q6. are the sister chromatids for chromosome 4 similar or different in sequence? q7. now draw the chromosomes during metaphase ii of meiosis for the cell you drew in q3. clearly label all alleles for all genes. also, label the sister chromatids, centromere,

Explanation:

Step1: Recall meiosis - Metaphase I

In metaphase I of meiosis, homologous chromosomes pair up at the equator of the cell. Each chromosome consists of two sister - chromatids.

Step2: Analyze the genotype

The genotype RW Bb G2G3 indicates three gene loci. For each locus, there are two alleles. Homologous chromosomes carry the alleles.

Step3: Draw the cell

Draw three pairs of homologous chromosomes (for chromosomes 4, 5, and 6). On each chromosome of a pair, label the alleles. For example, for the B/b locus, one homologous chromosome could have B and its sister - chromatid also has B, and the other homologous chromosome of the pair has b and its sister - chromatid has b.

Step4: Answer Q4

DNA replication occurs before meiosis. So, in metaphase I, the DNA is replicated.

Step5: Answer Q5

Since the cell has homologous chromosome pairs, it is diploid.

Step6: Answer Q6

Sister chromatids are identical in sequence (assuming no mutations) as they are produced by DNA replication. So, sister chromatids for chromosome 4 are similar in sequence.

Step7: Recall meiosis - Metaphase II

In metaphase II, sister - chromatids line up at the equator. Homologous chromosomes have already separated in anaphase I.

Step8: Draw for metaphase II

Draw the chromosomes with their sister - chromatids lined up. Label the alleles, sister - chromatids, and centromeres.

Answer:

For Q3: A drawing of a cell with three pairs of homologous chromosomes (for chromosomes 4, 5, 6) labeled with alleles from the genotype RW Bb G2G3, with sister - chromatids and homologous chromosomes labeled.
For Q4: Replicated
For Q5: Diploid
For Q6: Similar
For Q7: A drawing of the chromosomes during metaphase II with alleles, sister - chromatids, and centromeres labeled.