Chapter 13 - Observing Patters In Inherited Traits Flashcards
A heterozygous individual has a _________ for a trait being studied.
a. pair of identical alleles
b. pair of nonidentical alleles
c. haploid condition, in genetic terms
b. pair of nonidentical alleles
An organism’s observable traits constitute its ________.
a. phenotype
b. variation
c. genotype
d. pedigree
a. phenotype
Filial means ____________.
offspring
The second-generation offspring of a cross between individuals who are homozygous for different alleles of a gene are called the _________.
a. F1 generation
b. F2 generation
c. hybrid generation
d. none of the above
b. F2 generation
F1 offspring of the cross AA x aa are _______________.
a. all AA
b. all aa
c. All Aa
d. 1/2 AA and 1/2 aa
c. All Aa
A testcross is a way to determine ___________.
a. phenotype
b. genotype
c. both a and b
b. genotype
Assuming complete dominance, crosses between two dihybrid F1 pea plants , which are offspring from a cross AABB x aabb, result in F2 phenotype ratios of _____________.
a. 1:2:1
b. 3:1
c. 1:1:1:1
d. 9:3:3:1
d. 9:3:3:1
The probability of a crossover occurring between two genes on the same chromosome __________.
a. is unrelated to the distance between them
b. decreases with the distance between them
c. increases with the distance between them
c. increases with the distance between them
A gene that effects three traits is ___________.
a. epistatic
b. a multiple allele system
c. pleiotropic
d. dominant
c. pleiotropic
____________ alleles are both expressed.
a. Dominant
b. Codominant
c. Pleiotropic
d. Hybrid
b. Codominant
A bell curve indicates __________ in a trait.
continuous variation
Match the terms with the best description.
___ dihybrid cross
___ monohybrid cross
___ homozygous condition
___ heterozygous condition
a. bb
b. AABB x aabb
c. Aa
d. Aa x Aa
Match the terms with the best description.
(b) dihybrid cross
(d) monohybrid cross
(a) homozygous condition
(c) heterozygous condition
a. bb
b. AABB x aabb
c. Aa
d. Aa x Aa
