2.5.9 - 2.5.14 Genetics 4 FMQuiz Homework Solution
Q. What is the difference between a nucleus of an
egg cell and that of a somatic (body) cell of an
animal?
A. Egg cell is haploid or Somatic cell is diploid
Q. Explain the term isolation in the context of
genetic engineering.
A. Locating or Removal of a gene (or a piece of DNA
or a plasmid)
Q. Suggest an advantage of producing genetically
identical animals.
A. Same wool quality
Q. In genetics, what is meant by sex linkage?
A. Gene on sex (or X or Y) chromosome
Q. What term is used to describe alleles that lie on
the same chromosome?
A. Linked
Q. What is meant by genetic engineering?
A. Manipulation of genes
Q. State an application of genetic engineering
involving a micro-organism.
A. Production of hormone or enzymes or interferon
Q. Name three processes involved in genetic
engineering.
A. Isolation / cutting (or restriction) /
transformation (or ligation) / introduction of base
sequence (changes) / expression
Q. State an application of genetic engineering
involving a plant.
A. Slow ripening tomatoes or Herbicide resistant
plants or freeze-resistant plants
Q. Explain the term ligation in the context of
genetic engineering.
A. The joining of DNA (or plasmid or gene)
Q. Name a condition in humans that is governed by
a sex-linked allele.
A. Haemophilia or Colour blindness
Q. What is meant by Segregation?
A. Separation of a pair of allelic genes during
meiosis resulting in each gamete having only one
of the pair of genes
Q. Explain why linked genes do not assort
independently.
A. They are transmitted on the same chromosome
Q. Suggest a disadvantage of producing genetically
identical animals.
A. Lack of variation or Prone to disease
Q. State the Law of Independent Assortment.
A. During gamete formation each member of a pair
of genes may combine randomly with either of
another pair
Q. Name the two types of nitrogenous base found
in DNA.
A. Purines and Pyrimidines
Q. Which nitrogenous base can link only to
thymine?
A. Adenine
Q. Explain the term expression in the context of
genetic engineering.
A. The activation of the inserted gene or
production of product
Q. State an application of genetic engineering
involving an animal.
A. “antifreeze” in farmed fish or pharmaceuticals
from transgenic animals
Q. Which nitrogenous base can link only to
cytosine?
A. Guanine
Q. Explain the term restriction (cutting) in the
context of genetic engineering.
A. Cutting the DNA (or plasmid) with a (restriction)
enzyme
Q. Explain the term transformation in the context
of genetic engineering.
A. The uptake of DNA (or plasmid or gene)
Q. Name a cell organelle, apart from the nucleus, in
which DNA is found.
A. Mitochondrion or Chloroplast
Q. Name the type of bonding which occurs
between members of a base pair in the DNA
molecule.
A. Hydrogen
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