This document contains genetics problems involving monohybrid and dihybrid crosses. It begins with background on genes, alleles, phenotypes, and Mendel's laws of inheritance. It then presents 5 genetics problems involving traits such as body color, head shape, nose length, blood type, and baldness. For each problem, it asks for the genotypes and phenotypes of offspring from a cross, as well as the phenotypic and genotypic ratios in subsequent generations. It concludes by asking for the importance of genetics and an explanation of one of Mendel's laws of inheritance.

5. The study of
heredity and the
variation of
inherited
characteristics.

7. It is a locus of DNA that encodes a functional
protein product, and is the molecular unit
of heredity.
B. Allele
D.
Chromosome
A. Gene
C. Genome
A. Gene

8. The allele of a gene that masks or
suppresses the expression of an alternate
allele.
D. Recessive
A.
Homozygous
B. Dominant
C.
Heterozygous
B. Dominant

9. It is the physical appearance of an
organism.
C. Genotype
B. Genotypic
ratio
D. Phenotype
A. Phenotypic
ratio
D. Phenotype

10. A Mendelian law which states that every
individual organism contains two alleles for each
trait, and that these alleles separate during
meiosis.
C. Independent
Assortment
D. Dominance
B. SegregationA. Unit Factor B. Segregation

12. Problem: 1
In Squarepants family, yellow body
(Y) is dominant against brown
body (y). If SpongeBob which is a
purebred married SpongeJane
which is recessive for the trait
what would be the genotype of
their kids?

13. Problem: 1.1
What if the F1 generation married
another sponge with the same
trait. Find the genotype,
phenotype, G.R and P.R of the F2
generation.

14. Problem: 2
Patrick recently married Patti, a
cute girl he met at a local dance. He
is considered a purebred for his tall
head shape (T), which is dominant
over a short head (t). If Patti is a
short-headed woman, what type of
heads would their children have?

15. Problem: 2.1
What if the F1 generation married
another starfish with the same trait.
What percentage of the F2 will be
phenotypically tall? short?

16. Problem: 3
SquidWard and SquidLiza, have
the longest nose in the family.
SquidWard is believed to be
heterozygous for his long nose
shape, while SquidLiza’s family
brags that they are a pure line.
Show the possible trait of their

17. Problem: 3.1
What if F1 is crossed to homozygous
short nose squid. Determine the
phenotype of the F2 generation.
What fraction of the F2 will be
phenotypically long? Short? Give the
P.R and G.R .

18. Problem: 4
Barnacle boy is blood type A(IA). He
married a girl whose blood type is
B(IB). If they are both
heterozygous(having an allele i) for
the trait determine the possible
blood type of their children.

19. Problem: 4.1
If Barnacle boy is afflicted to a pattern
baldness (XbY) and his wife is a carrier for
the trait (XBXb). What are the percentage of
having normal, carrier, and afflicted children?

20. Problem: 5
Elizabeth who is a carrier of hemophilia (XHXh)
married Mermaid man which is normal (XHY).
What are the chance of having Normal?
Carrier? and Afflicted children in fraction.

24. appropriate answer
for every questions.
1.Give one importance of
genetics.
2.Choose one law in
Mendelian law of
inheritance then illustrate
and explain it as brief as

25. points)
SpongeBob is known for his
big round eyes (R), which is
dominant over an oval eye
shape (r). If he is heterozygous
for his round eye shape and
marries a woman with oval eye
shape, what type of eyes might
the kids have? Give the
phenotypic ratio of the F1