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16 Cards in this Set

  • Front
  • Back
The chemical factors that determine traits are called
Genes
The principle of dominance states that
some alleles are dominant and others are recessive.
Organisms that have two identical alleles for a particular trait are said to be
homozygous.
The number of chromosomes in a gamete is represented by the symbol
N
If an organism’s diploid number is 12, its haploid number is
6
Gametes are produced by the process of
Meiosis
What is shown in http://upper.usm.k12.wi.us/academics/faculty/rheun/inherittest_files/i0080000.jpg
crossing-over
Chromosomes form tetrads during
prophase of meiosis I.
Unlike mitosis, meiosis results in the formation of
four genetically different cells.
Linked genes
are on the same chromosome.
How many chromosomes are shown in a normal human karyotype?
46
Which of the following can be observed in a karyotype?
an extra chromosome
In humans, a male has
one X chromosome and one Y chromosome.
Colorblindness is more common in males than in females because
the allele for colorblindness is recessive and located on the X chromosome.
The failure of chromosomes to separate during meiosis is called
nondisjunction.
Because the X chromosome contains genes that are vital for normal development, no baby has been born
without an X chromosome.