please solve both of them, I don\'t have many post question to upload seperatell
ID: 218646 • Letter: P
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please solve both of them, I don't have many post question to upload seperatelly.
Changes in Chromosome Structure - Copy What results from unequal crossing over between homologous chromosomes? O a duplication on one chromosome O a deletion on one chromosome O a reciprocal translocation O an inversion on both chromosomes O Both (a) and (b) occur but not (c) or (d). O answers (a), (b), (c) and (d) are all possible results. Submit Request Answer Part D Which of the following crosses will produce progeny whose germ cells will produce an unpaired loop at metaphase of meiosis I? O A cross between a strain homozygous for a chromosomal deletion and a wild type strain. O A cross betwween a strain homozygous for a chromosomal duplication and a wild type strain. O A cross between a strain homozygous for a reciprocal translocation and a wild type strain. O o O O A cross between a strain homozygous for an inversion and a wild type strain. all the answers are correct Only answers (a) and (b) are correct. Only answers (c) and (d) are correct.Explanation / Answer
Q1) Both a and b can occur but not c and d
Unequal crossing over is a type of gene duplication or deletion event that deletes a sequence in one strand and replaces it with a duplication from its sister chromatid during mitosis or from its homologous chromosome during meiosis.?
Q2) only answeres a and b are correct
During metaphase, a large deletion or duplication in the cromosome, creates an area of mismatch between the altered chromosome and its normal homolog. This creates an unpaired loop in which one homolog is missing its pairing partner thus creating a loop.
Q3) none of the options are false.
The hybrid is created using haploid gamets of both species. During metaphase I there no bivalents but 23 univalents. And due to the presence of an unpaired chromosome, the hybrid is sterile.
Q4) 9 bivalents an 14 univalents
Hybrid is obtained by fusion of a diploid gamete from A ( 18 chromosomes) and haploid gamete from B (14 chromosomes). since the chromosomes from A are diploid, they form 9 bivalents. where as the 14 choromosomes from B are unpairee, hence they form 14 univalents.
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