Honors Biology Punnett Squares Test UPDATED ACTUAL Exam Questions and CORRECT Answers

Honors Biology Punnett Squares Test
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Gregor Mendel - CORRECT ANSWER - Father of Genetics, worked with pea plants and
gave basic laws of inheritance and terminology


Pure Trait (Thoroughbred) - CORRECT ANSWER - Both parents give the same allele
ex. AA or aa


Dominant Allele - CORRECT ANSWER - masks the recessive trait. Represented by a
capital letter.


Recessive Allele - CORRECT ANSWER - masked by the dominant allele. Represented by
a lowercase letter.


Homozygous Dominant - CORRECT ANSWER - Two dominant alleles.
ex. AA


Homozygous Recessive - CORRECT ANSWER - Two recessive alleles.
ex. aa


Heterozygous - CORRECT ANSWER - A mix of dominant and recessive alleles.
ex. Aa
plants: hybrid
humans: carrier


Phenotype - CORRECT ANSWER - The physical appearance of a trait.

, Genotype - CORRECT ANSWER - The alleles that make up a trait.



Autosomal Gene - CORRECT ANSWER - On an autosomal chromosome.



Sex-linked gene - CORRECT ANSWER - -On a gender chromosome.
-Most research is done on the X chromosome.


P (parent) Generation - CORRECT ANSWER - -Founded by Mendel
-Each parent in the P generation is pure.
-One parent is a pure dominant and the other is a pure recessive.


F1 (filial) Generation is the offspring of ...... - CORRECT ANSWER - The P generation



How is the F2 generation made? - CORRECT ANSWER - The crossing of two individuals
from the F1 generation.
-probabilities always work out for the F1 and F2 generations.


Co-dominance - CORRECT ANSWER - -One allele doesn't mask the other.
-There are three phenotype possibilities.
-used for plants and animals
*No dominant, no recessive--> blend of both


Incomplete Dominance - CORRECT ANSWER - Co-dominance used for human beings.
ex. blood types


What are the three major X-linked diseases? - CORRECT ANSWER - 1. Red-green
colorblindness