Unit 7 Genetics Test Review
Flashcard
•
Biology
•
9th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does Mendel’s law of segregation state?
Back
The two alleles for a trait separate when gametes are formed.
2.
FLASHCARD QUESTION
Front
What is the genotype of a female fruit fly with red eyes that is heterozygous?
Back
X^R X^r
3.
FLASHCARD QUESTION
Front
If a red-eyed male fruit fly (X^R Y) is crossed with a heterozygous female (X^R X^r), what percent of their offspring will have white eyes?
Back
25%.
4.
FLASHCARD QUESTION
Front
What is codominance in genetics?
Back
A situation where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive.
5.
FLASHCARD QUESTION
Front
In chickens, what is the phenotype of a heterozygous chicken with alleles B (black) and W (white)?
Back
Erminette (black and white spotted).
6.
FLASHCARD QUESTION
Front
What percent of the offspring will be erminette when an erminette chicken is crossed with a black chicken?
Back
50%.
7.
FLASHCARD QUESTION
Front
What are the possible allele combinations from a parent with genotype BbRr?
Back
BR, Br, br, br.
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