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20. How many traits are compared in a dihybrid cross?
 
2
 
4
 
1
 
6
19. Who is the father of genetics?
 
Gregor Mendel
 
Mr. Hayes
 
Carl Sagan
 
Anton Von Leevonhook
18. What is the percent chance that two people that are both carriers of sickle cell anemia will have a child with sickle cell?
 
25%
 
50%
 
75%
 
100%
17. The physical characteristics of an organism are its..
 
Phenotype
 
Genotype
 
Heredity
 
Genetics
16. A man with blood type homozygous A marries a woman with type O. The baby has blood type..
 
A
 
O
 
AB
 
B
15. Organisms that have two identical alleles for a trait are said to be..
 
Homozygous
 
Heterozygous
 
Dominant
 
Hybrid
14. Different forms of genes are known as..
 
alleles
 
Hybrids
 
Pure breeds
 
Recessive traits
13. Which of the following combinations of sex chromosomes represents a male?
 
XY
 
XXY
 
XX
 
Y
12. Colorblindness is more common in males than in females because
 
males only need the recessive trait on one X
 
Males only need the recessive traits on the Y
 
Males only need the traits on all the chromosomes
 
Males only need the trait on both chromosomes
11. The failure of chromosomes to separate during meiosis is called..
 
nondisjunction
 
Turner's SYndrome
 
Klinefelters Syndrome
 
X-chromosome deactivation
10. What term is used to describe a blending of traits..when neither is dominant or recessive?
 
Incomplete dominance
 
Codominance
 
Sex-linked
 
Complete dominance
9. What term is used to describe when both traits are dominant and show up at the same time?
 
Codominance
 
Incomplete dominance
 
Complete dominance
 
sex-linked
8. Is this child a male or female?
female
7. Does this karyotype show a normal number of chromosomes?
yes
6. How many chromosomes are shown in this karyotype?
46 chromosomes
5. Which chromosomes in the picture are autosomes?
pairs 1-22
4. Do you think this trait is sex-linked or autosomal?
Autosomal
3. How many kids did the original parents have?
5
2. How many generations are in the chart
3
1. Are blue eyes dominant or recessive in the chart?
Recessive
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