Units 3 and 4 Review

Genetics can be described as passage of genetic instructions from one generation to the next generation.  Which scientist studied the cross breeding of traits in pea plants?

• Charles Darwin   
• Gregor Mendel
• Robert Hook 
• Sir Isaac Newton

Which of the following best defines heredity?

• The passage of genetic instructions from one generation to the next generation
• The study of the genetic instructions that are passed from parent to offspring
• The specific sequence of DNA and RNA that code for specific traits
• The process of creating more organisms of a species
  

Helen Keller was an American author most famous for overcoming the challenges caused by an illness that left her deaf and blind. When Hellen Keller was 19 months old, she was stricken with an infectious disease that is now believed to be scarlet fever or meningitis. After struggling to live, Keller became blind and deaf because of the infection. While she was born with brown eyes, the illness caused her to have her eyes removed and replaced with blue eyes made of glass. At the age of 7 with the help of her teacher, Anne Sullivan, Keller was able to learn how to finger spell words while touching objects to build her vocabulary. Soon, Helen Keller was able to move from phrases like short, wavy hair to describe her own features to writing entire stories. Helen Keller became a renowned advocate for the education of all students and became a shining example of how many challenges can be overcome with the help of a teacher.                                                                                                         Based on the information above, what characteristic described is an inherited trait of Hellen Keller?

• Short hair
• Deafness
  
• Brown eyes
  
• Finger spelling
  

Students observed a plant left by a window over several days. The plant was watered daily. After three days, the plant began to grow towards the window.
Which of the following best explains the student’s observations?

• Heat from the Sun caused the plant to grow towards the window.
  
• The plant is leaning towards the window to get fresh air.
  
• The plant is responding to the stimulus of sunlight.
  
• The plant is responding to water in the air and growing towards it.
  

Sexual reproduction —

• results in genetic variation in the offspring
  
• produces offspring that are identical to the parent
  
• decreases the chances of survival of the species
  
• results in genetic material being donated to offspring by only one parent
  

An organism inherits its genetic instructions from the —

• organism's offspring
  
• organism's parents
  
• organism's mating partner
  
• organism's prey
  

In sexual reproduction, how many genes does an offspring receive for each trait?

• 1
• 2
• 3
• 4

Heredity is defined as the passage of genetic instructions from one generation to the
next. Which of the following is NOT an example of these genetic instructions in humans?

• Height
  
• Skin color
  
• Dimples
  
• Spoken language
  

What is an advantage of offspring produced from sexual reproduction?

• Offspring may be unfit for the environment in which they are formed.
  
• Traits are consistently conserved from generation to generation.
  
• Offspring are able to have more advantageous traits than their parents.
  
• Offspring are smaller and more active than their parents.
  

What internal stimulus would cause the plant to respond by wilting?

• Exposure to too much sunlight
  
• Exposure to very little sunlight
  
• An abundance of water in the stem
  
• A lack of water in the stem