Exam VI Flashcards
Ch. 13, 14, 16, & 17
Alternative forms of a gene at a given locus are called:
Alleles
Is an example of a homozygous genotype
AA and aa
Is an example of genotypes that lead to dominant phenotypes:
Aa and AA
if R is dominant to r, the offspring of the cross of RR with rr will:
display the same phenotype as the RR parent
What does the law of segregation explains?
Explains the behavior of a pair of alleles (homologous chromosomes) during meiosis
Mendel’s dihybrid crosses, but not his mono-hybrid crosses showed that:
Gene pairs are sorted into gametes independently of other gene pairs.
The following happens in incomplete dominance:
a. one allele is not dominant to another allele.
b. the genotype can be determine by the phenotype.
c. the heterozygote is somewhat intermediate to the two homozygotes
Multiple effects of a single gene is known as:
pleiotropy
Which of the following would be the least satisfactory organism for genetic research?
Humans
Observable traits are tracked through generations by means of
pedigrees
If a daughter expresses an X-linked recessive gene, she inherited the trait from:
both parents
A chromosome’s gene sequence that was ABCDEFG before modification and ABCDLMNOP afterward is an example of:
trans-location
A chromosome’s gene sequence that was ABCDEFG before modification and ABCDCDEFG afterward is an example of:
duplication
A chromosome that has been broken and rejoined in a reversed sequence has undergone:
inversion
The condition occurring when an organism has 2n + 1 chromosome composition is known as:
trisomy
The study of patterns in the distribution of plants and animals around the world is
biogeography
The study of body plans and structures among groups of organisms is called:
comparative morphology
According to Darwin, natural selection is based on:
Variations found in populations
