Grouse in Russia show a recessivemutation short tail that causes pro...

Grouse in Russia show a recessive mutation â€œshort-tailâ€ that causes problems in the control of direction when...

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Biology

Grouse in Russia show a recessivemutation â€œshort-tailâ€ that causes problems in the controlof direction when flying. In 2002 a survey of a large, freelyinterbreeding, population of 1,856 grouse revealed 142 with shorttail feathers.
a) What proportion of the grousepopulation would you expect to be heterozygous at theshort-tail locus
b) What proportion of the grousepopulation would you expect to be heterozygous at theshort-tail locus
c) Due to rising affluence there wasan increase in recreational grouse hunting. In a later survey ofthe grouse over some years it was found that a significant decreasehad taken place in the population. In 2003 there were 2,861 grouseand in 2004 there were only 2,369 and all the surviving grouse hadlong tails. Support by calculation that this change would reflectgreater vulnerability of short tail grouse to killing byhunters.
d)After further random mating ofsurvivors what would be the percentage of homozygous dominants,heterozygotes and homozygous recessives expected in the nextgeneration in the absence of any further hunting?

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4.3 Ratings (864 Votes)

AnsAs given in the question that the mutation is recessive type which means only homozygous recessive type will show shot tail and homozgous dominant as well as heterozygous grouse will show wild type phenotype Now as given in the question that the number of individuals having short tail is 142 out of 1856 So the allelic frequency of homozygous recessive individuals is 1421856 See Answer

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Grouse in Russia show a recessive mutation â€œshort-tailâ€ that causes problems in the control of direction when...