CELL DIVISION
MEIOSIS AND GENETIC VARIATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The baby will be a normal, healthy baby boy. The X is not necessary for survival.
|
|
|
The baby will be a normal, healthy baby girl. You must have both an X and a Y to be male.
|
|
|
The baby will be a super masculine male with none of the feminine characteristics carried on the X chromosome.
|
|
|
The X chromosome is necessary for life because it carries genes that code for non-sex characteristics so the embryo will die.
|
Detailed explanation-1: -Overview. Turner syndrome, a condition that affects only females, results when one of the X chromosomes (sex chromosomes) is missing or partially missing. Turner syndrome can cause a variety of medical and developmental problems, including short height, failure of the ovaries to develop and heart defects.
Detailed explanation-2: -Without functional sex-determining region Y protein, a fetus will not develop testes but will develop a uterus and fallopian tubes, despite having an X and a Y chromosome.
Detailed explanation-3: -Affected individuals are usually very tall. Many experience severe acne during adolescence. Additional symptoms may include learning disabilities and behavioral problems such as impulsivity. Intelligence is usually in the normal range, although IQ is on average 10-15 points lower than siblings.
Detailed explanation-4: -Though each of these chromosomes contains genetic instructions, those on the X chromosome are absolutely necessary. Without an X chromosome, the zygote will not survive.