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Mendelian Genetics: Biology Exam Practice Questions and Answers (100% Pass)
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Mendelian Genetics: Biology Exam Practice Questions and Answers (100% Pass)
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©PREP4EXAMS@2024 [REAL EXAM DUMPS] Friday, July 19, 2024 6:13 AMMendelian Genetics: Biology Exam Practice
Questions and Answers (100% Pass)
If two parents have an autosomal recessive trait, what can you say about their children? - ✔️✔️All
the children will have the trait because it is recessive.
Name the 4 blood phenotypes - ✔️✔️A, B, AB and O
What is blood type controlled by? - ✔️✔️A gene with the alleles A, B and O
If two parents have an autosomal dominant trait, what can you say about their children. - ✔️✔️All
the children will have it if both parents (or one parent) is homozygous dominant. There is a 75%
chance that all their children will have it if both parents are heterozygous and a 25% chance that
they won't have it.
If a child has an autosomal dominant trait, what can you say about the parents? - ✔️✔️At least one
of them has the dominant allele for the trait
Name the three Rh symbols and their dominance - ✔️✔️RR: homozygous dominant (positive)
Rr: heterozygous (positive)
rr: homozygous recessive (negative)
What is incomplete dominance? - ✔️✔️Neither of the alleles are dominant or recessive: there is a
mixture of the two traits expressed
What can be said about father to son transmission of x-linked traits? - ✔️✔️Fathers don't transmit
their x-linked traits to their sons because the sons get their x chromosomes from their mothers
not their fathers
What are sex-linked traits? - ✔️✔️Traits that are due to a damage on the x chromosome
Mendel's law of segregation - ✔️✔️The donation of parent gametes to the offspring is random
Can autosomal dominant traits skip generations? Why? - ✔️✔️Yes they can if both parents are
heterozygous
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