Which of the following about the law of segregation is true?
(1) It states that each of two alleles for a given trait segregate into same gametes.
(2) It can be explained by the segregation of heterologous chromosomes during meiosis.
(3) It can account for the 3:1 ratio seen in the F2 generation of Mendelʹs crosses.
(4) It is a method that can be used to determine the number of chromosomes in a plant.
In guinea pigs, black coat color is a dominant trait and white is a recessive trait. When heterozygous black pigs are intercrossed the chance of the first two offspring being black is:
(1) 75 %
(2) 56 %
(3) 44 %
(4) 6 %
The minimum progeny population size allowing for random union of all kinds of gametes from AaBbCc parents is:
(1) 9
(2) 16
(3) 27
(4) 64
How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE?
(1) 4
(2) 8
(3) 16
(4) 32
Two heterozygous round yellow seeded pea plants are intercrossed. In the progeny, the trait for seed shape will segregate in the ratio:
(1) 1 : 1
(2) 3 : 1
(3) 1 : 1 : 1 : 1
(4) 9 : 3 : 3 : 1
Given the parents AABBCc × AabbCc, assume simple dominance and independent assortment. What proportion of the progeny will be expected to phenotypically resemble the first parent?
(1) 1/4
(2) 1/8
(3) 3/4
(4) 3/8
In a cross between AABB X aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be:
(1) 9 : 3 : 3 : 1
(2) 2 : 1 : 1 : 2
(3) 1 : 2 : 2 : 1
(4) 7 : 5 : 3 : 1
Which of the following terms best describes when the phenotype of the heterozygote differs from the phenotypes of both homozygotes?
(1) Incomplete dominance
(2) Multiple alleles
(3) Codominance
(4) Epistasis
A man of blood group A marries a woman of AB blood group. Which type of progeny would indicate that man is heterozygous A?
(1) AB
(2) A
(3) O
(4) B
The gene for eye color in a certain organism has seven alleles. How many genotypic combinations are possible?
(1) 2
(2) 14
(3) 28
(4) 56