The position on chromosome where a gene si located is often referred to a…….
a) point
b) locus
c) GPS
d) posture
Explanation: the plural of locus is loci
Most genes exist in alternative versions or alleles with differences at one or more……….in the DNA.
a) amino acid
b) nucleotide position
c) histone protein
d) sugar
The alleles related to the same trait are occupied on the……..locus on……...
a) different ---different chromosome
b) same---different chromosome
c) same--- same chromosome
d) all of these
Explanation: e.g. three different alleles of gene “I” (IA, IB, Io) are found on the same locus at chromosome 9.
A gene has usually…….regions.
a) two
b) three
c) four
d) five
Explanation: 1. Regulatory region and 2. Structural region
Where the regulatory region of the gene is located?
a) 5’ end of coding strand
b) 3’ prime end of coding strand
c) in the center of coding strand
d) both a and b
Explanation: promoter region located to 5’ end while terminator region to 3’ end
Gene and chromosome show parallel behavior except…….
a) composition
b) heredity
c) inheritance
d) number
