1. What percentage of sperm cells carry an X chromosome? 2. What percentage of sperm cells carry a Y chromosome? 3. What percentage of egg cells carry an X chromosome? 4. How many chromosomes are shown on a normal human karyotype? 5. How can a karyotype be used to compare normal humans to those with chromosomal abnormalities​

answer; both surfaces of the membrane are nonpermeable

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.

answer; ///progressive relaxation;