Short hair (L) is dominant to long hair (l). IS a short-haired animal of unknown genotype is crossed with a long-haired animal and they produce one long-haired and one short-haired offspring, the results would indicate that
a) the short-haired animal was homozygous.
b) the long-haired animal was heterozygous.
c) the short-haired animal was heterozygous.
d) both the long-haired and short-haired animals were heterozygous.
Ans: c) the short-haired animal was heterozygous.
You might also like to view...
A mammalian fetus possesses a mutation that causes it to only synthesize adult hemoglobin. How will this mutation affect the fetus? Select all correct choices
A. The fetus will derive more oxygen from its mother's bloodstream. B. The fetus will derive less oxygen from its mother's bloodstream. C. The fetus will derive the same amount of oxygen from its mother's bloodstream as if it produced fetal hemoglobin. D. The fetus will not derive oxygen from its mother's bloodstream, as oxygen is provided by the amniotic fluid. E. The fetus will not derive oxygen from its mother's bloodstream, as the blood of the fetus does not come into contact with maternal blood.
The eggs of the blood fluke Schistosoma haematobium range from 110 to 170 µm long by 40 to 70 µm wide and have a sharp, pointed terminal spine. In which specimen is this organism most likely found?
a. Ascites fluid b. Sputum c. Bile d. Urine
Independent assortment means that _____
A. monohybrid crosses will show segregation and independent assortment B. the segregation of one gene pair depends on the segregation of another gene pair C. the gametes produced must be heterozygous in all cases D. the segregation of one gene pair occurs as if no other gene pair was present E. the phenotypic ratio in F2 will be the same for dihybrid and monohybrid crosses
Which phrase best defines what is meant by gene linkage?
a. genes that affect two different traits and that lead to a 9:3:3:1 phenotype ratio in a dihybrid cross b. genes that do not sort independently due to their being physically near each other on the same chromosome c. different alleles of the same gene d. genes whose effects combine to affect a single characteristic