In genetics, a chi-square test can be used to determine ____
a. whether an organism with a dominant phenotype is homozygous or heterozygous
b. whether an allele exhibits complete or incomplete dominance
c. what the predicted outcome of a dihybrid cross will be
d. how closely actual results of a cross match the expected results
e. whether a trait is determined by one gene or many genes
ANSWER: d
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Eyelash length is an inherited trait. In the human population, there is an eyelash length gene. There are two possible variants of this gene - an allele for long eyelashes (> 1cm) and an allele for short eyelashes (1 cm or less). How many eyelash length alleles does an individual have in one of her/his somatic cells?
A. 46 B. 23 C. 2 D. 3 E. 1
The centromere of human chromosome 15 creates a long arm and a barely discernable short arm. Therefore, this chromosome is
A) telocentric. B) acrocentric. C) submetacentric. D) metacentric.
Four of the five answers listed below are adaptations to aid in dispersal of fruit. Select the exception
a. hooks b. spines c. smooth surface d. tufted hairs e. fleshy fruits
The type of reproductive isolation in which two populations are separated due to the sperm cells of one not being able to fertilize the egg cells of the other is
A. ecological isolation. B. hybrid infertility. C. gametic isolation. D. hybrid inviability. E. temporal isolation.