ANSC 221 EXAM 3 QUESTIONS WITH
CORRECT ANSWERS
Which if the most correct description of a dominant trait? - Answer-The trait that is seen
in a heterozygous individual
An individual that has the same allele of a gene on both chromosomes is said to be -
Answer-homozygous
Which of Mendel's laws cannot be observed in a monohybrid cross? - Answer-
independent assortment
If you have true breeding strains that differ only in a single character, how could
determine which trait for that character is dominant? - Answer-create a monohybrid for
that character and see which trait is present
Mendel's Law of Segregation is supported by a 1:1 test cross ratio - Answer-true
What types of ratios are likely to occur in crosses when evaluating the segregation of
two allele at one gene? - Answer-3:1, 1:1, 1:2:1
Durring a ____ cross, an individual with the dominant phenotype and unknown
genotype is crossed with a _______ individual to determine the unknown genotype -
Answer-test, homozygous recessive
which of the two phenotype is recessive? - Answer-checkered
Results from the cross in (e) indicate that the checkered F1 individuals are homozygous
for the recessive allele. - Answer-true
The genotypes of the plain birds in cross (f) are: - Answer-Cc, Cc
If i took F1 progeny from cross (b) and (c) and crossed them, I would expect what ratio
in the offspring? - Answer-0% checkered, 100% plain
Which of the following most accurately exemplifies Mendel's law of segregation? -
Answer-Homologous chromosomes separate during gamete formation
CORRECT ANSWERS
Which if the most correct description of a dominant trait? - Answer-The trait that is seen
in a heterozygous individual
An individual that has the same allele of a gene on both chromosomes is said to be -
Answer-homozygous
Which of Mendel's laws cannot be observed in a monohybrid cross? - Answer-
independent assortment
If you have true breeding strains that differ only in a single character, how could
determine which trait for that character is dominant? - Answer-create a monohybrid for
that character and see which trait is present
Mendel's Law of Segregation is supported by a 1:1 test cross ratio - Answer-true
What types of ratios are likely to occur in crosses when evaluating the segregation of
two allele at one gene? - Answer-3:1, 1:1, 1:2:1
Durring a ____ cross, an individual with the dominant phenotype and unknown
genotype is crossed with a _______ individual to determine the unknown genotype -
Answer-test, homozygous recessive
which of the two phenotype is recessive? - Answer-checkered
Results from the cross in (e) indicate that the checkered F1 individuals are homozygous
for the recessive allele. - Answer-true
The genotypes of the plain birds in cross (f) are: - Answer-Cc, Cc
If i took F1 progeny from cross (b) and (c) and crossed them, I would expect what ratio
in the offspring? - Answer-0% checkered, 100% plain
Which of the following most accurately exemplifies Mendel's law of segregation? -
Answer-Homologous chromosomes separate during gamete formation
