Download Cell Division and Genetics Test Review

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Genetics Test Review
Complete this review using all notes and worksheets, and the online book.
**The link is: www.pearsonsuccessnet.com username: Schruba1 password: biology2
1. Know Mendel’s three laws.
2. Match the following words:
_____ Gene
_____ Allele
_____ Dominant
_____ Recessive
_____ Homozygous
_____ Heterozygous
_____ Genotype
_____ Phenotype
_____ Diploid
_____ Haploid
_____ Chromosomes
a. One expressed form of a gene (one in the letter pair)
b. Having two pairs of chromosomes (ex: humans have 46
chromosomes)
c. Two different alleles for the same trait (ex: hybrids)
d. Description of a physical trait, how it looks
e. Genetic makeup (ex: using letters to represent traits)
f. One set of chromosomes (ex: sperm contain only
23 chromosomes)
g. DNA winds tightly into these stick like structures of the
nucleus
h. A section of DNA that codes for a trait
i. Allele which is weaker and can be hidden
j. Allele which usually shows up (ex: capital letters)
k. Two alleles which are the same (ex: pure breeding)
3.
Using G for dominant (green) and g for recessive (yellow), work out the following crosses, and find
their ratios.
a. Cross a heterozygous pea plant with a yellow pea plant.
b. Cross two heterozygous pea plants
4. Using your Difficult Punnett Problems worksheet, write the
following definitions, give an example, and complete the
following crosses.
a. Incomplete Dominance:
i. R=red, r=pink. Cross a red parent with a pink parent.
ii. What are the genotypes and phenotypes of the offspring?
b. Co-dominance:
i. B=black feather, W=white feather. Cross two speckled parents.
ii. What are the genotypes and phenotypes of the offspring?
iii. Explain co-dominance in terms of blood types, meaning how do A, B, AB, and O act
when in a punnett square.
iv. Work a punnett square between a dad with homozygous A (IA)
blood, and a mom with homozygous recessive O blood (ii).
c. Sex-linked traits:
i. XC =normal vision, X- =color blind. Cross a carrier mom with a
normal vision dad. What are the genotypes and phenotypes for
the offspring?
5. Set up the following dihybrid cross, find the phenotypic ratio. (follows normal dominance rules) T=tall,
t= short. R=red flower, r=white flower.
a. Cross heterozygous parent with short and white flower parent.
6. Karyotypes:
a. Which pairs are the autosomes, which are the
sex chromosomes?
b. What gender is this person?
c. Is there a problem with these chromosomes, and
if so, what is it and where is it?
7. Pedigrees:
a.
b.
c.
d.
e.
Which shape represents a female?
Which shape represents a male?
Why are some shapes shaded in?
How are individuals in a pedigree named?
What kind of trait mostly affects only males?
8. Predict phenotypes of the following dihybrid cross: heterozygous male dog with black, fine hair (Bbss)
crossed with a female dog who has white fine hair.(bbss).