Which of the following is incorrect about genetic effects on behavior?
A. Fraternal twins are a good model system to study the influence of genes on behavior.
B. When two species of lovebirds that differ in the way they carry twigs were mated, their offspring showed an intermediate phenotype.
C. Behavior can be influenced by genes that affect the neural circuitry within the brain.
D. In mice, the fosB gene seems to determine if a female will nurture her young.
E. In humans, the relative importance of genes versus environment is still debated.
Answer: A
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How would this image be different if the individual were male?
1.There would be only one X chromosome.
2.There would be 24 pairs of chromosomes.
3.There would be three 21st chromosomes.
4.It would not be any different.
Below is a pedigree of a fairly common human hereditary trait in which the boxes represent males and the circles represent females. Shading symbolizes the abnormal phenotype
Given that one gene pair is involved: (a) Is the inheritance pattern X-linked or autosomal, recessive, or dominant? (b) Give the genotype of each individual in the pedigree. If more than one genotypic possibility exists, present all possible alternatives.
All atoms of an element have the same number of ________
A) protons plus neutrons B) protons C) electrons D) neutrons
The coronary arteries supply blood to cardiac tissue. Which chamber of the heart requires the greatest amount of blood supply to keep it working?
A) left atrium B) right atrium C) left ventricle D) right ventricle