orly one parent contributes genatic material, hich or c. Hydra yelow and 1a d. A
ID: 201962 • Letter: O
Question
orly one parent contributes genatic material, hich or c. Hydra yelow and 1a d. Angiosperms e gymnospeems If a man and a woman produce a son that is affected with hemophilia, which of the following s b. the father carmries an allele for hemophia d. neither parent camies an allele for hemophilia death eany masked the eflects masked the ofects of the y of the Y aliele. s aflected with tor e. the boy's patermal grandlather is hemophilac 15. Which of the tollowing explains a signficany low 20, in organisms that undergo anemation of generations, thhe diplold stage is caled the rate of crossing over between two gees a. They are located far apart on the same b. They are located on separate but homologous c. The genes code for proteins that have similar d, hybrid e.dicot functions 21. All of the folowing contribute to genetic recombination EXCEPT a. random fertlization d. The genes code for proteins that have very diflerent functions e. The genes are located very close together on the same c. crosseng over d. gene inkage e. random gene mutation 22. In cucumbers, warty (W) is dominant over dul (w), and green (G) is dominant over orange (g). A cucumber plant that is homozygous for wateriness and green color s crossed with one that is homozygous for dullness and orange color. The F1 are then crossed to produce an F2 generation. If a total of 144 offspring are produced, which of the following is the closest to the number of du green cucumbers expected? a. 3 b. 10 c. 28 d. 80 e. 161 16. In the pedigree above, which inheritance best describes the pedigree for this trait? b. sex-Iinked dominant c. autosomal recessive d. autosomal dominantExplanation / Answer
Question 13:
Hydra reproduces asexually by buds. Buds are produced in its body, these buds break and grown into adults.
Annelids are hermaphrodite
Gymnosperms – where the female gametophyte is not in ovary, they are exposed outside. Male and female cones are present.
Angiosperms – Where the female gametophyte is present inside the ovary.
Answer: c. Hydra
Question 14:
In human, haemophilia is a sex linked recessive trait. If a man and women produce son that is affected with haemophilia, which of the following is definitely true?
Answer: a. the mother carries an allele for haemophilia.
Mother gives one X in 2 XX chromosomes and father gives Y chromosome. If mother is the carrier that one X allele has the gene for haemophilia, then that carrier X chromosome along with Y chromosome gives the son with haemophilia.
Question 15:
Which of the following explains a significantly low rate of crossing over between 2 genes?
Crossing over occurs between 2 non sister chromatids. If the genes located far in the same chromosome then the chance of crossing over is high. If the genes are present very close to each other then the chance of crossing over is low.
Answer: The genes are located very close together on the same chromosome.
Question 16:
Autosomal dominant inheritance:
Answer: d. Autosomal dominant inheritance.
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