They are heterozygous because there are two different bands that appear on the gel. These two elephants come from two different populations that are geographically distant from one another. If the gel were to show data from two elephants that were siblings, would their profiles be more or less similar?
Are elephants heterozygous?
If you now look at marker FH67, the frequencies of the two alleles in the ivory sample are 0.1 and 0.24. The probability of an elephant being heterozygous for those two alleles is 2(0.1)(0.24) = 0.048.
How can you tell if an elephant is homozygous or heterozygous?
If the two alleles are the same, the individual is homozygous for that particular marker and only one band will appear on the gel. If two different bands appear on the gel, then the individual has inherited two different alleles for that marker and is heterozygous.
How can you tell if someone is homozygous or heterozygous from a gel?
We can use electrophoresis to observe these DNA segments and determine if the organism was homozygous or heterozygous with respect to the DNA at that locus. Homozygous individuals will have the same DNA sequence at this locus in both chromosomes. Heterozygous individuals will have two different versions of this DNA.
Why do scientists use multiple genetic markers when comparing elephants?
Why do scientists use multiple markers to identify individuals in gel electrophoresis? The more markers used, the smaller the likelihood that two individuals will have the same results. … Variable among individuals, amplifiable across samples. Why are elephants a keystone species?
How many elephants are killed each year for their ivory?
Why is taking ivory tusks from elephants illegal? Behind every piece of ivory—whether it be a full tusk or carved trinket—is a dead elephant. Poachers kill about 20,000 elephants every single year for their tusks, which are then traded illegally in the international market to eventually end up as ivory trinkets.
Is heterozygous recessive or dominant?
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb. Finally, the genotype of an organism with two recessive alleles is called homozygous recessive.
Are the two elephants in the gel on the left homozygous or heterozygous?
They are heterozygous because there are two different bands that appear on the gel. These two elephants come from two different populations that are geographically distant from one another.
Why do forensic scientists use 13 STRs?
Within the U.S., the 13-STR profile is a widely used means of identification, and this technology is now routinely employed to identify human remains, to establish or exclude paternity, or to match a suspect to a crime scene sample.
Is it better to be homozygous or heterozygous?
So in the homozygous condition, a cell possesses either two same type dominant alleles (RR) or recessive alleles (rr). Whereas in the heterozygous condition the cell contains two non-identical alleles (Rr).
|When two identical alleles are present.||When two different alleles are present.|
What is an example of heterozygous?
If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. The relationship between the two alleles affects which traits are expressed.