Quiz 4-6

Question 1

what could cause a form of myosin that is 1/3 length normal mysosin?

Answer 1

alternative splicing with no change in base sequence-produces different lengths of protein
alternative splicing with change in base sequence-different versions of proteins produced from same gene
point mutation in coding region-could introduce premature stop codon or alter folding to form a shorter protein
frameshift-creates shorter, non functional version

Question 2

key step in G1 cell cycle checkpoint

Answer 2

activation of cyclin dependent kinases

Question 3

the phenotypic effect of an indel involving a small number of nucleotides depends on…

Answer 3

if it occurs in somatic or germline
if it occurs in coding or non coding

Question 4

what does it mean that flowering plants do not have a segregated germline

Answer 4

some somatic mutations can affect future generations

Question 5

how can a reciprocal translocation affect gene dosage in offspring

Answer 5

they may not assort together in meiosis

Question 6

what is the least deleterious type of translocation

Answer 6

involves 2 acrocentric chromosomes

Question 7

why do sex chromosome aneuploids have less severe affects than autosomal

Answer 7

dosage compensation
barr bodies
x inactivation