BIOL 1141 Lecture Notes - Lecture 28: Apoptosis, Meiosis
1 May 2018
School
Department
Course
Professor
Mutation
The image on the right shows homologous
chromosomes paired in the salivary glands from a
Drosophila larva. The homologs are paired with
alleles of genes associated along the length of each
chromosomal pair. The box contains aregion of one
chromosome pair that differ by an inversion, so that
one homolog forms a loop and the other pairs over
the loop. Use regional designations, e.g., A, B, C,
etc., to show pairing between these chromosomes.
G-C
The image below shows the series of three cell divisions that give rise to a 7-cell organism. One
of the cells produced in these divisions undergoes apoptosis. Two of the cells, colored gray, of
this organism are germ cells that undergo meiosis to produce gametes. The others are somatic
cells. Using the mechanism of
deamination of 5-
methylcytosine, illustrate
the formation of a single
mutation present in 2 of
the somatic cells, and a
separate mutation present
in a single germ cell.
Which of the mutations
could produce a
phenotypic difference in
this organism’s offspring?
Document Summary
The image on the right shows homologous chromosomes paired in the salivary glands from a. The homologs are paired with alleles of genes associated along the length of each chromosomal pair. The box contains a region of one chromosome pair that differ by an inversion, so that one homolog forms a loop and the other pairs over the loop. Use regional designations, e. g. , a, b, c, etc. , to show pairing between these chromosomes. The image below shows the series of three cell divisions that give rise to a 7-cell organism. One of the cells produced in these divisions undergoes apoptosis. Two of the cells, colored gray, of this organism are germ cells that undergo meiosis to produce gametes. Using the mechanism of deamination of 5- methylcytosine, illustrate the formation of a single mutation present in 2 of the somatic cells, and a separate mutation present in a single germ cell.
