BIOLOGY B HBS FINAL REVIEW
UPDATED EXAM SCRIPT 2026 TEST
PAPER QUESTIONS AND SOLUTIONS
GRADED A+
◉ What is the organization of genetic information within a cell
nucleus?.
Answer: Genes--> Chromosomes-->Nucleus
◉ If Yellow is dominant to Green in pea plants and a plant exhibits the
yellow phenotype, what are the possible genotypes?.
Answer: Yy or YY
◉ Which cells are considered gametes in humans?.
Answer: Egg (Ova) in females; Sperm in males
◉ What is the number of chromosomes found in normal human
gametes?.
Answer: 23 chromosomes
◉ What is Mendel's Law of Independent Assortment?.
Answer: Factors for different traits are inherited independently of one
another.
◉ What is the expected phenotypic ratio in any dihybrid cross?.
, Answer: 9-3-3-1 or (9/16:3/16:3/16:1/16)
9: Dominant-Dominant
3: Dominant-Recessive
3: Recessive-Dominant
1: Recessive Recessive
◉ What do the boxes found in a punnett square represent?.
Answer: Potential genotypes for the offspring.
◉ Crossing Over.
Answer: What process is shown in the illustration provided?
◉ Why is meiosis significant in helping to maintain the continuation of
a species?.
Answer: It provides for chromosomal variation in the gametes produced
by an organism.
◉ If Snapdragon's exhibit incomplete dominance. What would the
PHENOTYPIC ratio be of a white plant crossed with a pink plant?.
Answer: 1: 1 (White to pink, no red plants will result)
◉ What are the possible gametes for a parent who is BbTt?.
Answer: BT, Bt, bT, tb
UPDATED EXAM SCRIPT 2026 TEST
PAPER QUESTIONS AND SOLUTIONS
GRADED A+
◉ What is the organization of genetic information within a cell
nucleus?.
Answer: Genes--> Chromosomes-->Nucleus
◉ If Yellow is dominant to Green in pea plants and a plant exhibits the
yellow phenotype, what are the possible genotypes?.
Answer: Yy or YY
◉ Which cells are considered gametes in humans?.
Answer: Egg (Ova) in females; Sperm in males
◉ What is the number of chromosomes found in normal human
gametes?.
Answer: 23 chromosomes
◉ What is Mendel's Law of Independent Assortment?.
Answer: Factors for different traits are inherited independently of one
another.
◉ What is the expected phenotypic ratio in any dihybrid cross?.
, Answer: 9-3-3-1 or (9/16:3/16:3/16:1/16)
9: Dominant-Dominant
3: Dominant-Recessive
3: Recessive-Dominant
1: Recessive Recessive
◉ What do the boxes found in a punnett square represent?.
Answer: Potential genotypes for the offspring.
◉ Crossing Over.
Answer: What process is shown in the illustration provided?
◉ Why is meiosis significant in helping to maintain the continuation of
a species?.
Answer: It provides for chromosomal variation in the gametes produced
by an organism.
◉ If Snapdragon's exhibit incomplete dominance. What would the
PHENOTYPIC ratio be of a white plant crossed with a pink plant?.
Answer: 1: 1 (White to pink, no red plants will result)
◉ What are the possible gametes for a parent who is BbTt?.
Answer: BT, Bt, bT, tb
