Threadlike structures passed from parents to offspring
100
What is a dominant trait and how many genes need to be present for it to show?
A strong trait- there only needs one gene present.
100
What is an instinctual behavior?
A way of acting that is passed from parents to offspring
100
What is a life cycle?
Stages that living things pass through as they grow and change.
200
What is a gene?
Factor that contains the DNA code for a trait
200
Greg has free ear lobes. His younger sister has attached. Why?
Greg has the dominant factor free ear lobes.
200
What is an organisms environment?
All of the living and nonliving things that surround and affect an organism
200
What is an inherited trait?
Characteristics passed from parents to offspring
300
What is the name for cell devision and what do body cells make when they divide?
It is called mitosis and they make exact copies of themselves
300
What is the likelihood of a baby having blue eyes (a recessive trait) if both of the baby's parents also have blue eyes? Why?
The baby will have the- for the recessive trait to show a person has to inherit two of the same genes. Since both parents have the recessive trait, neither can pass on the dominant gene and give the baby a different color eyes.
300
A duck moves to another lake because the one he use to live on was polluted. What changed for the duck that caused it to move?
the environment
300
Explain how both learned and instinctual behaviors play a role in animals hunting.
They know to hunt because they desire meat, they learn to hunt skillfully. Practicing hunting helps them to be more successful.
400
What is formed during meiosis?
Gametes, which have half the number of chromosomes
400
What is a recessive trait?
A recessive trait is a weak trait.
400
Give three examples of instincts a cat has.
Eat, ,sleep more than he's awake, take care of young, run from danger, hunt mice
400
What is asexual reproduction?
One celled organisms, like yeast or bacteria, reproduce through mitosis.
500
What are the three reasons cells divide?
Regeneration, growth, asexual reproduction
500
How are traits passed from parent to offspring?
On genes.
500
What about a human's appearance might be affected by their environment?
Hair style, clothes, etc.
500
Give two examples of recessive traits and two examples of dominant traits.
Recessive- blue eyes, attached earlobes
Dominant- brown eyes, left thumb on top