Condogenoemde
he biology module b - l. flint (fall)
english
aleuw
58: 06
33
while investigating a break-in, the police discover that the intruder was cut on the broken window that he or she used to enter
the house and left a sample of blood behind. soon after the crime, the police apprehend a suspect and obtain a dna sample
which process is most likely to be used to determine whether the blood on the glass belongs to the suspect?
pcr analysis
str analysis
mtdna analysis
y-chromosome analysis
nex
submit

The correct option is B) STR analysis

Explanation:

Short-tandem repeats can be described as a repetitive pattern of 2-16 base pairs which is unique to individuals. In molecular biology or forensic studies, STR analysis is done to determine the Short- tandem repeat regions in an individual. This analysis helps to discriminate one DNA from another.

The forensic scientist can use the STR analysis from the blood on the glass and compare it with the STR analysis of possible suspects.

b

explanation:

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation: