Genetics DEFGHIJKL 1. A normal chromosome has the following gene sequence: ABC centromere An inversion heterozygote...
1. An inversion heterozygote has the following inverted chromosome: ABCD JIHGF.EKLM. a. Sketch how this chromosome will pair with its normal homologue (AB CDE FGHIJ K L M) in prophase I. Make sure you include all strands (remember, the chromosomes are replicated). (2 pts) b. What four gametes result when a single crossover occurs between genes F and G on one inversion and one normal chromosome? (4 pts)
3. A phenotypically abnormal individual has a phenotypically normal father with an inversion on one copy of chromosome 7 and a normal mother without any changes in chromosome structure. The order of genes along chromosome 7 in the father is as follows: normal chromosome 7) RTDM centromere P UXZC RTDUP centromere MXZC (inverted chromosome 7) The phenotypically abnormal offspring has a chromosome 7 with the following order of genes R TDM centromere P U D TR With a sketch (complete),...
11. A normal chromosome and its homolog carrying an inversion are given below (Y* = centromere) Normal: ABCDEFGH Inversion: a dcbe*fgh Answer the following questions about these homologs (8 points total) 11c. Suggest four gamete genotypes that could be produced during a single episode of meiosis if there is a is a crossover between B & C in the inversion heterozygote. Be sure to indicate the position of the centromere with a * Write V or I beside each gamete...
Mr Crabs suffers from semi-sterility due to a pericentric inversion on chromosome #10. His normal chromosome #10 has the sequence of genes as follows (the dot represents the centromere): ABCD·EFGH. His inverted #10 has the sequence: AFE·DCBGH. a. What proportion of Mr Crab’s gametes will be viable if no crossing over occurs within the inverted segment? b. What proportion of Mr Crab’s gametes will be viable if a cross over occurs between genes F-E? c. What is the sequence of...
A normal chromosome and its homolog carrying an inversion are given below (* Y= centromere): Normal: ABCD * EFGH Inversion:a fe* dcbgh Answer the following questions about these homologs (8 points total) What gamete genotypes are produced if there is a crossover between B & C? Be sure to use a * to indicate the position of the centromere. Put each gamete on a separate line, and write (V) or (I) beside each one to indicate whether it is viable...
A normal chromosome and its homolog carrying an inversion are given below (* Y= centromere): Normal: ABCD * EFGH Inversion:a fe* dcbgh Answer the following questions about these homologs (8 points total) What gamete genotypes are produced if there is a crossover between G & H? Be sure to include a * to show the position of the centromere. Put each gamete on a separate line, and write (V) or (1) beside each gamete to indicate whether it is viable...
11. A normal chromosome and its homolog carrying an inversion are given below (Y* = centromere) Normal: ABCDEFGH Inversion: a dcbe*fgh Answer the following questions about these homologs (8 points total) 11d. Imagine one population of mice is homozygous for the 'normal' chromosome. A nearby population is homozygous for the 'inversion' chromosome. Can gene flow occur between these two populations? Why or why not? (Your answer should include a brief definition of gene flow, and an explanation as to why...
19. A viable inversion heterozygote is undergoing meiosis. The chromosomes are illustrated below. Compare the consequences of crossing over in two cases: crossing over between C and D, and crossing over between F and G ABCDEFGHIJK 2 ABCHG FEDIJK 20. Using the same inverted chromosome above: a. Two crossing over events occur among these chromatids: a crossover between genes H and G on chromatids 2 and 4, and a crossover between genes D and E on chromatids 1 and 3....
Consider two non-homologous chromosomes whose normal sequence of segments and centromere locations are shown here. What kind of changes are these? I think it's a translocation and i cannot tell what the second one is. Question 7: (2 points) Consider two non-homologous chromosomes whose normal sequences of segments and centromere locations are shown here. Chromosome 1 A B C D E F G H Chromosome 2 O R . S T U V Determine the type (or types) of chromosomal...
1. A flower is heterozygous for the following inversion of chromosome 1 (dot=centromere) A B C ● D E F G a b e d ● c f g a. Is this a paracentric or pericentric inversion? I am thinking Pericentric? b. Draw the pairing configuration at prophase I including all 4 chromatids. I wasnt too sure how to map the loop out for this one c. Give the genotypes of the gametes from this meiosis if there is a...