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WorksheetsChallenge # 1 Ninth Grade
Total questions: 15
Worksheet time: 36mins
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
ATG TGA CAG
GTA AGT GAC
TAC ACT GTC
CAT TCA CTG
What determines the code, or information, of a DNA molecule?
the shape (structure) of the nitrogen bases
the color of the nitrogen bases
the frequency (number) of nitrogen bases
the order (sequence) of the nitrogen bases
Which 2 molecules form the sides (backbone) of the DNA ladder?
Deoxyribose sugar and adenine
Deoxyribose sugar and the nucleus
Deoxyribose sugar and phosphate
Deoxyribose sugar and a hydrogen bond
Traits that are passed from generation to generation are called ____________________
Excited Traits
Inherited Traits
Special Traits
Dominant Traits
What are the nucleotides made of?
Sugar, Phosphate, nitrogen base
Thymine, Adenine, Cytomine
Phosphate, Nitrogen, Adenine
Phosphate, Adenine, nitrogen base
A green pea plant (Gg) is crossed with a yellow pea plant (gg). Describe the genotype of the offspring. (Be sure to remember that the capital letter is dominant).
50% heterozygous and 25% homozygous recessive
100% homozygous recessive
50% heterozygous and 50% homozygous recessive
25% heterozygous and 50% homozygous
A white flower (rr) is crossed with a white flower (rr). What is the phenotype of the offspring? Draw a Punnett square and answer the question.
75% white; 25% red
100% white
100% red
75% red; 25% white
T - tall and t = short In the punnett square below, what belongs in the missing square
tt
Tt
Bb
TT
What are the phenotype percentages of the offspring?
(A-Brown fur color; a-white fur color)
50 % Brown fur and 50% White fur
25 % Brown fur and 75% White fur
75 % Brown fur and 25% White fur
0% Brown fur and 100% White fur
Both parents in this Punnet square
are homozygous dominant
are heterozygous
are homozygous recessive
have blue eyes
The genotypic ratio here is:
25% blue eye 75 % brown eye
BB= 50 % bb = 50%
BB = 25% Bb = 50% bb = 25%
All brown eye and one blue.
What did Mendel notice about the pea plants in his monastery garden?
Characteristics from parent plants were either present or not present in their offspring
The plants got taller with each generation
Characteristics from the parent plants were blended together to make the offsprin
If one parent was tall, and the other short, the offspring would be a medium size
Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa
AA
Aa
Brown fur
aa
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
100% Pp (purple)
50% Pp (purple); 50% pp (white)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
75% Pp (purple); 25% pp (white)
What does heterozygous mean?
An organism that has the same genes for a trait (TT or tt)
An organism that has different allele for a trait (Tt)
When neither gene is fully dominant; offspring is a mixture of both
the different forms of a trait (hair color--> brown, blonde, red
