Year 9 Genetics

What is DNA? (Check the correct boxes)

• Deoxyribo Nucleic Acid

• Offspring

• located in the nucleus

• determines the genetic traits of an organism

What are the four bases of DNA?

What is a chromosome?

• made of DNA

• located in the nucleus

• contains genetic information needed to carry out cell functions and make new cells

• Created by a scientist

An allele that is fully expressed when carried by only one of a pair of homologous chromosomes

• Recessive trait

• Heredity

• Dominant

• Mitosis

Pigeons have Chromosomes.

• True

• False

The physical expression of a trait in an organism is known as the - 

• hybrid

• genotype

• gene

• phenotype

After MEIOSIS the daughter cells will contain ____ chromosomes if the original cell contained 80.

• 78
• 40

• 23
• 46

In the diagram above, if C is thymine, D must be:

• thymine

• adenine

• guanine

• cytosine

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?

• 25%
• 0%
• 100%
• 50%

phenotype is

• the genetic makeup

• the trait you see

• a photograph

• is a type of pheno