Please help me with this genetics question!! I really appreciate Item 8 Syntenic

Question

Please help me with this genetics question!! I really appreciate

Item 8

Syntenic genes can assort independently.

Part A

Explain this observation.

a. Syntenic genes that are separated by 50 map units or more will assort independently because there will be only one crossover between them per meiosis. b. Syntenic genes that are separated by 25 map units or more will assort independently because there will be one or more crossovers between them per meiosis. c. Syntenic genes that are separated by 50 map units or more will assort independently because there will not be crossover between them per meiosis. d. Syntenic genes that are separated by 50 map units or more will assort independently because there will be one or more crossovers between them per meiosis. e. None of all above.

Explanation / Answer

Gene pairs that assort independently exhibit a recombination frequency of 50% because the number of parental types = the number of recombinants . Genes may assort independently either because they are on different chromosomes or because they are far apart on the same chromosome. The recombination frequencies of pairs of genes indicate how often 2 genes are transmitted together. For linked genes, the frequency is less than 50%. The greater the distance between linked genes, the higher the recombination frequency (rf). Recombination frequencies become more inaccurate as the distance between genes increases.

so answer is

d. Syntenic genes that are separated by 50 map units or more will assort independently because there will be one or more crossovers between them per meiosis.

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