Nettet4. sep. 2024 · Meiosis begins with a cell called a primary spermatocyte. At the end of the first meiotic division, a haploid cell is produced called a secondary spermatocyte. This … NettetQuestion: Question 6 2 pts 2 pts] Question 6: A human zygote (fertilized human egg) has an abnormal sex chromosome genotype of YO meaning that the zygote only has a single Y chromatid and no other sex chromosomes. This abnormal genotype could have resulted from (note: to earn full credit you must correctly select ALL that are possible) O a ...
7.5: Sexual Reproduction: Meiosis and gametogenesis
Nettet• Use genetic diagrams to predict the results of monohybrid crosses and calculate phenotypic ratios, limited to 1:1 and 3:1 ratios • Use Punnett squares in crosses which result in more than one genotype to work out and show the possible different genotypes Extended • Explain how to use a test cross to identify an unknown genotype Nettetfor 1 dag siden · The phenomenon of unequal separation in meiosis is called nondisjunction. If nondisjunction causes a missing chromosome in a haploid gamete, … historical ohio newspapers
ch 26 actual Flashcards Quizlet
Nettet21. okt. 2024 · A zygote is a fertilized ovum. The germ cells undergo meiosis to reach a haploid state (n) as part of spermatogenesis and oogenesis. The sperm and the unfertilized ovum reinstates a chromosome set in zygote in a diploid state (2n). After fusing with the sperm, the second stage of meiosis takes place for separation of … Nettet22. nov. 2024 · Fertilization of an egg by a sperm produces a zygote. Each gamete contributes one allele to the genotype of the child that develops from the zygote. Two … NettetDizygotic twins develop in the uterus separately. Each zygote develops with its own chorion (or outer sac). The chorion is connected to the placenta, which is the protective … hon512pp