
Unit 4 Genetics Assessment Review
Flashcard
•
Biology
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is codominance in genetics?
Back
Codominance is a type of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive. An example is AB blood type.
2.
FLASHCARD QUESTION
Front
What is the role of the environment in determining phenotype?
Back
The environment can influence the expression of genes, leading to variations in phenotype. For example, a snowshoe hare changes color based on the seasons due to environmental factors.
3.
FLASHCARD QUESTION
Front
What phenotype is produced by the mRNA code UUU CCU CCC GUG?
Back
The phenotype produced is dry ear wax.
4.
FLASHCARD QUESTION
Front
What is incomplete dominance?
Back
Incomplete dominance is a genetic situation in which one allele does not completely dominate another allele, resulting in a new phenotype that is a blend of the two. An example is wavy hair.
5.
FLASHCARD QUESTION
Front
What is the expected phenotypic ratio when crossing two heterozygous pea plants (TtPp)?
Back
The expected phenotypic ratio is 9:3:3:1.
6.
FLASHCARD QUESTION
Front
Define multiple alleles in genetics.
Back
Multiple alleles refer to the presence of more than two alleles for a genetic trait within a population. An example is the ABO blood group system.
7.
FLASHCARD QUESTION
Front
What is polygenic inheritance?
Back
Polygenic inheritance is a type of inheritance where multiple genes influence a single trait, resulting in a continuous range of phenotypes, such as height or skin color.
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