A monohybrid (one-gene) cross yields 4 genotypic classes, and a dihybrid (two-gene) cross yields 16. How many classes are expected from a tetrahybrid (four-gene) cross?
What will be an ideal response?
Following the simple relationship 41 = 4 and 42 = 16, 44 = 256 expected genotypic classes.
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The embryo normally implants and develops in which of the following structures?
A. uterus B. ovaries C. fallopian tubes D. cervix E. vagina
The vascular bundles in eudicot stems separate the ground tissue into two zones. Which sequence correctly describes the arrangement of those zones from the outside to the center?
a. epidermis ? vascular bundle ? pith ? cortex b. pith ? vascular bundle ? cortex ? epidermis c. epidermis ? cortex ? vascular bundle ? pith d. epidermis ? vascular bundle ? cortex ? pith e. cortex ? epidermis ? vascular bundle ? pith
As an animal matures, it forms attachments to other individuals and develops preferences. This process is called
A. instinct. B. imprinting. C. associational learning. D. habituation. E. sensitization.
A two-point testcross is a cross between
A) a double heterozygote for two linked genes and a double recessive genotype. B) a heterozygote for one of two linked genes and a double recessive genotype. C) a double heterozygote for two linked genes and a homozygous dominant genotype. D) a heterozygote for one gene and a homozygote for another. E) individuals with two different genetic markers.