Which of the following is an example of a phenotype?
a. a cat’s genome
b. the color and length of a cat’s fur
c. the alleles that a female passes on to her offspring
d. the DNA sequence of an allele
e. the DNA sequence of an allele and the alleles that a female passes on to her offspring
B
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Which are characteristics that distinguish mammals from other vertebrates? Check all that apply.
_____ hair _____ endothermy _____ specialized teeth _____ enlarged skull _____ mammary glands
Why is it thought that homeotic genes arose very early in the evolution of animals?
What will be an ideal response?
The fluid portion of semen is produced by
a. the prostate gland. b. the seminal vesicle. c. the bulbourethral gland. d. the urinary bladder. e. all of these except the urinary bladder
Tallness (T) in snapdragons is dominant to dwarfness (t), while red (R) flower color is dominant to white (r). The heterozygous condition results in pink (Rr) flower color. A dwarf, red snapdragon is crossed with a plant homozygous for tallness and white flowers. What are the genotype and phenotype of the F 1 individuals?
A) ttRr-dwarf and pink B) ttrr-dwarf and white C) TtRr-tall and red D) TtRr-tall and pink E) TTRR-tall and red