Heredity

Which of the following definitions best describes genetics?  

• The study of mitosis.
• The study of the DNA structure.
• The study of how traits are passed from an organism to its offspring.
• The study of living versus non-living things.

What is the name of the scientist who developed the first genetic ideas using pea plants in   the 1860s?  

• Isaac Newton
• Gregor Mendel
• Albert Einstein
• Louis Pasteur

Scientist use capital letters (H) and lower case letters (h) to represent genes.  What type of   gene is represented by a capital letter?  

• Expressive
• Recessive
• Regressive
• Dominant

Plant 1 = Tt
Plant 2 = TT
Plant 1 is said to be: 

• heterozygous
• homozygous
• neither

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Plant 1 = Tt
Plant 2 = TT
Plant 2 is said to be: 

• heterozygous
• homozygous
• neither

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

DNA contains genes that provide instructions for inherited traits. What is the relationship  between the genes and chromosomes?  

• Genes are pieces of DNA that make up chromosomes
•  Genes are made up of thousands of chromosomes.
• Genes are identical to chromosomes
• For every chromosome there is normally one matching gene.

Which of these choices describes a piece of DNA that determines a specific trait such as attached earlobes?    

• a chromosome
• a heterozygous trait
•  a gene
• a characteristic

Which of these choices is the definition of allele?    

• the form of a gene that is always expressed
• one of the possible forms (or types) of a gene
• the combination of two genes for a specific trait
• the complete genetic makeup of a living thing

A species of rabbit can have brown fur or white fur. One rabbit with two alleles for brown fur  (BB) has brown fur. A second rabbit with two alleles for white fur (bb) has white fur. Which   statement is true about the alleles B and b?      

• They are always found on the same chromosome.
• They result in the same fur color.
• They are two different alleles of the same gene.
• They provide identical instructions for different' traits.

Ryan notices that all of his friend’s brothers and sisters are tall. What is the most likely   explanation for this characteristic?    

• They have tall parents that passed on their genes.
• They all have different genes.
• They eat only healthy foods.
• They live in the same environment.