If a boy exhibits a sex-linked trait that is carried on the X chromosome, what must be true? His mother exhibited that trait.
His father exhibited that trait.
His father’s mother carried an allele for that trait.
His mother carried at least one allele for that trait.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

Which statement is not an accurate description of meiosis? a) meiosis produces offspring that are genetically diverse. b) meiosis produces offspring that are identical to the parent. c) in sexual reproduction half of the genetic material comes from the father (sperm) and half of the genetic material comes from the mother (egg). d) meiosis decreases the number of chromosomes by half so that when a sperm fertilizes an egg, the resulting zygote has the correct number of chromosomes.

Slow down transpiration by the stomata question 9 options: a guard cells; closing b chloroplasts; closing c guard cells; opening d chloroplasts; opening