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20 questions
Which of the following genotypes is homozygous dominant?
Yy
yY
yy
YY
What is the genotypic ratio of the offspring?
3:1
1:3
1:2:1
2:2
What are the phenotype percentages of the offspring?
(A-Brown fur color; a-white fur color)
50 % Brown fur and 50% White fur
25 % Brown fur and 75% White fur
75 % Brown fur and 25% White fur
0% Brown fur and 100% White fur
In a Punnett square, a lower case letter stands for a ____________ allele.
dominant
recessive
homozygous
heterozygous
Hair color, height, eye color and freckles are examples of human traits. What do we call the physical expression of the genetic material of an organism?
genetics
heredity
genotype
phenotype
In animals, shaggy fur is dominant to short fur. The Punnett Square shows the genotypes of the offspring of a shaggy fur animal and a short fur animal. What were the genotypes of the parents?
FF and FF
Ff and ff
ff and ff
Ff and Ff
Heterozygous is when...
the alleles are the same.
the alleles are different.
the alleles are absent.
the alleles are present.
Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).
Cross a red flower with a speckled flower. What is the phenotypic ratio?
2 red, 2 speckled
2 red, 2 blue
2 blue, 2 speckled
When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....
Incomplete Dominance
Codominance
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