Did Humans Have a Tail?
Human tailbone or coccyx is a vestigial organ and is reminiscent of the tail, which is present for some period... View Article
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What Are the Two Causes of Variation?
The two main causes of variation are mutation and genetic recombination in sexual reproduction. Further reading: Adaptive Radiation Microevolution Organic... View Article
What is the Difference Between Hemophilia A and B?
Haemophilia is a bleeding disorder, which is caused due to deficiency of blood clotting factors. Haemophilia A is caused due... View Article
What Is Factor 9 Deficiency?
Blood clotting factors are named in Roman numerals, e.g. I, II, VIII, IX, etc. Factor IX is also called the... View Article
Why Is Haemophilia More Common in Males?
Haemophilia is an X-linked recessive disorder. Haemophilia is more common in males because they have only one X-chromosome and defect... View Article
What Is p and q in Genetics?
If two alleles of a gene are A and a, then p and q represent the frequencies of dominant and... View Article
Why Is Inbreeding Dangerous?
Inbreeding increases homozygosity. It increases the risk of offsprings with homozygous recessive alleles, which have deleterious effects. Further reading: Molecular... View Article
What Is Factor 9 in the Blood?
Factor 9 or IX is a clotting factor, which is involved in blood clotting. Defect in the gene leading to... View Article
What Causes Deviation from Hardy Weinberg Equilibrium?
Factors that affect Hardy Weinberg equilibrium are gene migration, genetic drift, natural selection, mutation and genetic recombination. These factors change... View Article
Can a Man With Haemophilia Pass it on to His Grandson?
Haemophilia is a sex-linked inherited disorder. It is an X-linked recessive disease. Men with haemophilia genes pass it on to... View Article
Can Haemophilia Be Detected Before Birth?
Haemophilia can be detected before birth by doing prenatal testing such as chorionic villus sampling (CVS) or amniocentesis. Further reading:... View Article
What Is the Phenotype Frequency?
Phenotype frequency is the proportion of individuals showing a particular trait or phenotype in the population. Further reading: Adaptive Radiation... View Article
What Are the Five Factors That Act to Change Allele Frequencies?
Allele frequencies of a population can be changed by natural selection, gene flow, genetic drift, mutation and genetic recombination. They... View Article
Why Does Each Genotype Have Two Letters?
The two letters in a genotype represent the pair of alleles. The uppercase letter represents the dominant allele and the... View Article
Is Haemophilia A or B Worse?
Haemophilia is a genetic disorder, which is caused due to mutation in the gene coding for clotting factors. Haemophilia A... View Article
How Do Mutations Occur?
Mutations may occur due to error at the time of DNA replication or due to external factors such as UV... View Article
Why is Haemophilia Rare in Females?
Haemophilia is rare in women due to its inheritance pattern. It is an X-linked recessive trait. Females have two copies... View Article
Does Everyone Have Unique DNA?
Although 99.9% of the genome is the same in all people, yet every individual has unique DNA, which accounts for... View Article
How Do You Calculate Phenotype Frequency?
Phenotype frequency for a particular phenotype is calculated by dividing the number of individuals of the particular phenotype by the... View Article
What Animal Is Closest to Human DNA?
Humans share around 98.7 percent genome with chimpanzees. Bonobos are also closest to humans and are very similar to chimpanzees.... View Article
