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Fun With Gene
Test Description: Anything under the sun about Genetics
Instructions: Answer all questions to get your test result.
1) In pea plants, tallness is dominant over shortness. If 50% of one generation of pea plants are short, what were the probable genotypes of the parents?
A
TT x tt
B
tt x tt
C
Tt x tt
D
Tt x Tt
2) What is basic unit of the DNA molecule?
A
nitrogen base
B
nucleotide
C
phosphate group
D
amino acid
3) Based on the gene chromosome theory, the law of independent assortment assumes that certain genes are what?
A
formed by chromosomal mutation
B
formed in the cytoplasm
C
located on separate chromosomes
D
located on the same chromosome
4) A husband and wife are going to have a baby. The husband has type AB blood, and the wife has type O. Which could NOT be the blood type of their child?
A
A
B
AB
C
B
D
All of the above could be the blood type of their child
5) Where does the hereditary information for most traits is generally located in?
A
mitochondria of gametes
B
lysosomes in cytoplasm
C
genes found on chromosomes
D
chromosomes found on genes
6) The mechanism that accounts for the separation and recombination of the 'hereditary factors' proposed by Mendel is best described in what?
A
theory of natural selection
B
concept of multiple alleles
C
gene-chromosome theory
D
concept of gradualism
7) What will happen if a base sequence of a strand of DNA is changed from A-T-G to A-T-C
A
The m-RNA will be changed from T-U-C to T-U-G
B
The m-RNA will be changed from U-A-C to U-A-G
C
The t-RNA will be changed from C-A-U to C-A-C
D
The t-RNA will be changes from U-A-C to T-A-C
8) According to the gene-chromosome theory, which statement is true?
A
alleles are located on nonhomologous chromosomes
B
genes are present only on human chromosomes
C
mutations occur mainly in sex cells
D
genes are arranged in a linear sequence on a chromosome
9) Phenlyketonuria (PKU), a human disease characterized by mental retardation,results from the
A
nondisjunction of chromosomes
B
increases production of several enzymes
C
inability to produce a specific enzyme
D
production of poisons by bacteria
10) Only red tulips from a cross between homozygous red and homozygous white tulips. What type of principle best illustrates the given situation?
A
segregation
B
incomplete dominance
C
independent assortment
D
dominance
*select an answer for all questions
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