What does variation mean?

Which of the following would increase the number of different alleles in a population?

Variation in a trait may be due to the change in genetic material. What do you call this type of change?

• DNA is the genetic material for all organisms
• DNA is made of sequence of nucleic acids
• Gene is the unit of heredity and codes for particular trait
• Change in sequence of nucleic acid is called mutation
• Not all mutations are harmful

The following information is about two individuals, X and Y.
*Individual X: presence of a dimple
*Individual Y: no dimple
Which of the following factors causes the difference in the trait between the two individuals?

• Traits under discontinuous variation have limited range 
• Traits under continuous variation have unlimited range 
• Discontinuous variation is due to the influence of genes alone
• Continuous variation is due to the combined effects of genes and environment

Which of the following statements is true?

• Variation is the difference in genetic makeup of two individuals of the same population
• Variation can be continuous or discontinuous
• Continuous variation is influenced by genetic and environmental factors
• Discontinuous variation is influenced by genetic factors
• Inheritance of genes from parents can be studied using pedigree chart

You get __% of your DNA from each parent.

• Gametes are haploid
• Zygote is diploid
• 50% DNA is from each parent

Emily has brown hair.
Which Statement most likely explains why Emily has brown hair?

• Gene is the unit of heredity
• Expression of gene is observed as traits like hair color, blood group, etc

Which of the following is an example of Inherited variation?

• Traits under discontinuous variation have limited range 
• Traits under continuous variation have unlimited range 
• Discontinuous variation is due to the influence of genes alone
• Continuous variation is due to the combined effects of genes and environment

Differences in DNA between individuals or populations

• Gene is a segment of DNA that codes for particular trait
• Gene is the unit of heredity
• Variation refers to difference existing between individuals of same population
• Variation can be due to effect of genes or environment or both

Student eye color could be considered what type of data?

• Variation is the difference between individuals of the same population
• Variation can be continuous or discontinuous
• Continuous variations do not have limited range. Height, weight are classical examples
• Discontinuous variations have limited range. Eye color, blood groups are classical examples
• Continuous and discontinuous variations are expressed in bell-shaped graph and bar graph, respectively

Which type of data would student height be categorized as?

• Variation is the difference in genetic make up of individuals among same species
• Variation can be continuous or discontinuous
• Continuous variations do not have limited range. Height, weight are classical examples
• Discontinuous variations have limited range. Eye color, blood groups are classical examples
• Continuous and discontinuous variations are expressed in bell- shaped graph and bar graph, respectively

Which one of the following is an environmental variation?

• Variation is the reason for the difference that exists between individuals of same population
• Variation can be due to genes or environmental conditions or a combination of both

This law describes how each homologous pair separates independently of any other pairs during Anaphase I of meiosis.

• Law of independent assortment was described by Gregor Mendel
• Segregation of individual traits occur during meiosis
• Independent assortment was described following dihybrid cross

What type of graph do we use for discontinuous variation?

• Variation is the difference in genetic make up of individuals among same species
• Variation can be continuous or discontinuous
• Continuous variations do not have limited range. Height, weight are classical examples
• Discontinuous variations have limited range. Eye color, blood groups are classical examples
• Continuous and discontinuous variations are expressed in bell- shaped graph and bar graph, respectively