What is true about the heterozygous sickle-cell (HbA HbS) condition? sickle-cell anemia is not expressed
sickle-cell anemia is expressed under conditions of oxygen deficiency
sickle-cell anemia is apparent in men
none of the above

xcvzcxvxzv

explanation:

i think its the first one

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.