SCIENCE ENTRANCE EXAM

• Incomplete Dominance - when the dominant trait did not totally masked the recessive trait
• Codominance - 2 or more traits are dominant and distinguishable at the same time
• The blood types are A, B, AB, and O
• XXX or XXY are Genetic Disorders
• XX - is the sex chromosome of female
• XY - is the sex chromosome of Male
• Sex Influenced - traits that are usually found in a certain gender but could also be found at the opposite gender
• Sex limited - a Trait that is limited to a certain gender
• James Watson and Francis Crick discovered the structure of DNA in 1953
• Dna is Composed of the following

  1. Sugar which is the deoxyribose, deoxy means removed one oxygen
  2. Phosphate which is PO4
  3. a nitrogen base which are A, T, G, and C which are Adenine, Thymine, Guanine, Cytosine
• Dna is in the shape of Double Helix or twisted ladder
• The nitrogen bond found in DNA and RNA are connected by a weak bond called Hydrogen Bond
• DNA and RNA is a nucleic acid made up of monomers called nucleotides
• DNA sugar is called Deoxyribose, while the sugar of RNA is called Ribose
• The side of the ladder of DNA or also called the backbones of the DNA, are made up of sugar deoxyribose and phosphate groups alternate all the way down.
• 5' to 3' - read as 5 prime to 3 prime. ' means prime
• xylem is the vessel found in plants that carries water from the roots to the parts of the plant.

  phloem is the vessel found in plants that carries glucose from the leaves throughout the parts of the plant.
• find the complimentary code of the DNA

  DNA: 5' ATTACGCACTG 3'

  DNA: 3' TAATGCGTGAC 5'
• Find the mRNA Transcript of the DNA codes below

  DNA: 3' ATGCCTATTCA 5'

  mRNA: 5' UACGGAUAAGU 3'
• BLOOD TYPES

  1. Which blood type can receive blood from all blood types?

  2. which blood type can give blood to all blood types?

  AB O

  Blood type O can be provided for all blood types but can only receive one from the same blood type

  Meanwhile, Blood type AB can receive from all blood types but can only give one to the same blood type
• What are the possible genotype of AB blood types?

  I^A I^B
• What are the possible genotype of A blood types?

  I^A i
• What are the possible genotypes of blood type O?

  ii
• TYPES OF CLOUDS

  CIRRO prefix in type names means it is found in the high part of the sky

  ALTO prefix in type names means it is found in the middle part of the sky

  STRATO prefix in type names means it is found in the low part of the sky
• Food chain line up

  producer(autotroph) note not only animals can produce their own food

  primary consumer

  secondary consumer

  tertiary consumer

  decomposers are the eaters of the dead like bacteria

  food web display complex food chain
• Density tell us how much mass exist in a given volume of a substance.
• Sound wave can travel through all mediums except in vacuum

  Vacuum