Genetics 7th Grade Review By Moore: Question Preview (ID: 19544)

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Which alleles indicate an organism that is hybrid for a trait?
a) BB b) Bb c) bb d) ABc
The passing of traits from one generation to the next is ____.
a) Botany b) Phenotype c) Heredity d) Genotype
How many pairs of chromosomes do humans have?
a) 22 b) 48 c) 46 d) 23
If a human is a girl, her sex chromosomes are:
a) XX b) XY c) GG d) Gg
A _______________ is a chart or family tree that tracks which members of a family have a particular trait.
a) Karyotype b) punnet square c) pedigree d) family tree
The scientific study of heredity is called
a) biochemistry b) genetics c) homogamy d) biology
The trait that is hidden by the presence of an overpowering trait is:
a) recessive b) dominant c) weak d) powerful
You and your colleagues are constructing a pedigree for a patient with cystic fibrosis. The individual's brother has also been diagnosed with cystic fibrosis. How would this brother be represented in the pedigree?
a) shaded square b) shaded circle c) unshaded square d) unshaded circle
A man carrying the allele for Huntington's disease marries a woman who is homozygous recessive for the allele. What is the probability that their offspring will develop Huntington's disease?
a) 0% b) 25% c) 50% d) 100%
An individual has type AB blood. His father has type A blood and his mother has type B blood. The individual's phenotype is an example of ____.
a) Co-dominance b) Heterozygous heredity c) simple dominant heredity d) simple recessive heredity
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