If you cross two pea plants, one with green peas and the other with yellow peas, you find all of the offspring have yellow peas. You conclude the yellow parent was
A. homozygous for the recessive allele.
B. heterozygous.
C. homozygous for the dominant gene.
D. homozygous for the dominant allele.
E. homozygous for the recessive gene.
D. homozygous for the dominant allele.
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Down syndrome can be caused by either trisomy 21 or a Robertsonian translocation
a. True b. False
Which one of the following correctly pairs the structure with its major function(s)?
A) hypothalamus–regulates body temperature, blood pressure, and hunger B) cerebellum–regulates memory, learning, and speech C) brainstem–is the input center for sensory data going to the cerebrum D) thalamus–coordinates balance
Organisms in the same genus, such as Canis lupus and Canis familiaris MUST also belong to the same:
a. species b. phylum c. kingdom d. b and c
What is a significant difference between X-linked and sex-influenced inheritances?
A) X-linked inheritance affects females and sex-influenced inheritance affects males. B) Sex-influenced inheritance requires epistasis. X-linked inheritance does not. C) There are no differences. They are the same. D) X-limited inheritance is only recessive. Sex-influenced inheritance can be recessive or dominant. E) In X-linked inheritance, the gene in question is on the X chromosome; in sex-influenced inheritance, the gene is autosomal.