The figure below shows the effect of an antagonistic pleiotropic mutation A. What would be the effect of a mutation B that delayed the onset of reproduction without changing the survival curve?
a. Genotypes carrying A and B would have a higher fitness than genotypes carrying A without B.
b. Genotypes carrying A and B would have a lower fitness than genotypes carrying A without B.
c. B would not have any effect on the fitness of individuals with A.
d. We cannot determine the effect of B without the survival curve for individuals that are wild-type at the locus affected by A.
B
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All of the following are associated with a protein-folding disease except
A) prions. B) tau protein. C) amyloid plaques. D) E-cadherin. E) apoplipoprotein E.
Periderm is produced by:
a. xylem. b. cork cambium. c. pith. d. cortex. e. phloem.
In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus on the same chromosome, there is a dominant gene for red eyes and its recessive allele for purple eyes. A male that was heterozygous at both gene loci was mated with a female that was homozygous for both recessive alleles and the following results were observed among the offspring:Normal wings and red eyes - 420Vestigial wings and red eyes - 80Normal wings and purple eyes - 70Vestigial wings and purple eyes - 430According to these data, what is the distance, in centimorgans, between these 2 gene loci? (Enter the number only without the units. For example, 100 cM would be entered as 100)
Fill in the blank(s) with the appropriate word(s).
Damage to or a tumor on which organ would lead to a disruption of the nervous and endocrine system?
A. pituitary B. hypothalamus C. pineal gland D. frontal lobe of the brain E. lymph nodes