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Unit 4 Semester Study Guide
GJUHSD Genetics Study Guide
21
Science
7th Grade
05/06/2006

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Cards

Term
What is the passing of traits from parents to offspring called?
Definition
Heredity
Term
How many sets of instructions does a fertilized egg receive from EACH parent?
Definition
One set from each parent. For humans that is 23 chromosomes from mom and 23 chromosomes from dad.
Term
What is the segment of DNA that determines the inheritance of a particular trait called?
Definition
Gene
Term
What is an inherited characteristic of an organism called?
Definition
Trait
Term
What is the amount of genetic information which you receive from each of your parents?
Definition
½ of the genetic information from mom and ½ of the genetic information from dad
Term
What are traits controlled by?
Definition
Genes
Term
What are examples of inherited characteristics?
Definition
Hair color, eye color, skin color, widow’s peak
Term
What are examples of inherited characteristics?
Definition
Hair color, eye color, skin color, widow’s peak
Term
What are some examples of characteristics that are not inherited?
Definition
Taste in music, Taste in books, how long you wear your hair
Term
What is the form of a gene called that shows up even when only inherited from one parent?
Definition
Dominant
Term
What is the form of the gene called that shows up only when inherited from both parents?
Definition
Recessive
Term
A bent little finger is an inherited trait which is present even when inherited only from one parent. What type of trait is this?
Definition
Dominant
Term
Freckles are a trait which only shows up when inherited from both parents. What type of trait is this?
Definition
Recessive
Term
Tongue rolling is a dominant trait which means that someone who can roll their tongue has inherited this trait from how many parents?
Definition
One or both parents
Term
Albinism (the absence of skin pigmentation) is a recessive trait this means that someone who is an albino has inherited this trait from how many parents?
Definition
Both parents
Term
If purple is dominant over white predict the appearance of the offspring if a white flower (pp) reproduced with a purple flower (PP).
Definition
All purple (Pp)
Term
If purple is dominant over white predict the appearance of the offspring if two purple flowers (Pp) reproduced.
Definition
3/4 purple (2/4 Pp and 1/4 PP) and 1/4 white (pp)
Term
If purple is dominant over white predict the appearance of the offspring if a white flower (pp) reproduced with a purple flower (Pp).
Definition
1/2 purple (Pp) and 1/2 white (pp)
Term
If green seeds is dominant over yellow seeds predict the appearance of the offspring if a yellow seed plant(gg) reproduced with a green seed plant (Gg).
Definition
1/2 yellow (gg) and 1/2 green (Gg)
Term
If green seeds is dominant over yellow seeds predict the appearance of the offspring if a yellow seed plant(gg) reproduced with a green seed plant (GG).
Definition
All green seeds (Gg)
Term
If green seeds is dominant over yellow seeds predict the appearance of the offspring if two green seed plants (Gg) reproduce.
Definition
3/4 green (1/2 Gg and 1/4 GG) and 1/4 yellow (gg)
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