What determines the chromosomal sex of the new embryo? The sperm (X or Y chromosome) Random chance The egg (X chromosome) Maternal age
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Which one is the determining factor in whether a human fertilized egg will be a male or female? A. hormones secreted by the uterus of the mother B. the sex chromosome content of the egg C. the number of hours elapsed between ovulation and fertilization D. the chromosome content of the sperm E. hormones secreted by the testes of the father
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The sex of a human fetus is determined by the: sex chromosome (X) carried by the female gamete. autosomes (numbered chromosomes) of the father. autosomes (numbered chromosomes) of the mother. sex chromosome (X or Y) carried by the male gamete.
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Most sexual organisms are either male or female, though some are hermaphroditic. In human beings and Drosophila (fruit fly), the sex of an individual is determined by the kind of sex chromosomes they possess. Males have two types of chromosomes, a big chromosome X and a small chromosome Y, while females have only one kind, 2X or XX. The X and Y chromosomes segregate during the formation of mature spermatozoa (spermatogenesis) so that a mature sperm contains only either X or Y. What is the probability of getting an X-bearing sperm? A Y-bearing sperm? How many kinds of ova, as to the kind of sex chromosome present, can be produced? Determine the probability of getting a boy or girl. Show your calculations.
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