Eight different strains of Drosophila have been isolated; each shows a recessive white eye trait. Crosses were performed as follows (W indicates white-eyed progeny, R indicates wild-type red eyed progeny).

A B C D E F G HA W W R R W R R WB W R R W R R WC W W R R R RD W R R R RE W R R WF W W R
G W RH Wa) Based on these crosses, how many different genes are present?

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

food source and hunting?

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.

dna is a set of a gene held together by a chemical bond