extraembryonic tissues. Totipotent cells formed during sexual and asexual reproduction include spores and zygotes. Zygotes are the products of the fusion of two gametes. In some organisms‚ cells can dedifferentiate and regain totipotency. For example‚ a plant cutting or callus can be used to grow an entire plant. Human development begins when a sperm fertilizes an egg and creates a single totipotent cell called zygote. In the first hours after fertilization‚ this cell divides into identical totipotent cells. Approximately
Premium Stem cell Embryonic stem cell
Centre No. Candidate No. Paper Reference(s) Surname Paper Reference Initial(s) 7 0 4 0 7040/01 0 1 Signature Examiner’s use only London Examinations GCE Biology Ordinary Level Paper 1 Monday 10 May 2010 – Morning Time: 1 hour 30 minutes Team Leader’s use only Question Leave Number Blank 1 2 3 4 5 Materials required for examination Nil Items included with question papers Nil 6 7 8 9 Instructions to Candidates In the boxes above‚ write your centre number
Premium Red blood cell Malaria Liver
allele and a lowercase letter to represent a recessive allele. One coin should have the mother’s gametes. The other coin should have the father’s gametes. 2. Flip the 2 coins simultaneously. The two coins together make up the genetic material of the zygote. Record the genotype of the offspring. 3. Repeat step 2 for a total of 50 trials. Record the results of your coin tosses below. _______________________________________________________________ _______________________________________________________________
Premium Genetics Allele Gene
ability to respond to his or her environment‚ has the ability to adapt‚ and has the ability to reproduce” (When does Human Life Begin‚ 2013). "Development of the embryo begins at Stage 1 when a sperm fertilizes an oocyte and together they form a zygote” (England‚ Marjorie A. 1996). By the fifth to sixth week of conception the fetus is living inside the mother and is metabolizing nutrition‚ excreting waste‚ moving‚ sucking its thumb‚ growing and as early as twenty one days after conception‚ the baby’s
Premium Pregnancy Life Abortion
What determines how a child develops? In reality‚ it would be impossible to account for each and every influence that ultimately determines who a child becomes. What we can look at are some of the most apparent influences such as genetics‚ parenting‚ experiences‚ friends‚ family relationships and school to help us understand the influences that help contribute to a child’s growth. Think of these influences as building blocks. While most people tend to have the same basic building blocks‚ these
Free Genetics Gene DNA
2. Contrast the life cycle of plants to that of animals: Typical life cycle: alteration of generation (plants)‚ diploid (animals) Resulting structure from meiosis: spores-plants‚ gametes-animals Occurrence of mitosis: gamete production-plants‚ zygote to individual-animals 3. Compare mosses and ferns by completing the following table Dominant Generation Vascular Tissue Flagellated Sperm Method of Offspring Dispersal Moss Gametophyte No Yes Windblown spore 4. Fern Sporpophyte Yes Yes Windblown
Premium Plant Eukaryote
organisms in order to live and/or reproduce. Another huge difference is that plants reproduce asexually by budding‚ fission‚ fragmentation‚ and regeneration. On the other hand‚ animals reproduce sexually through the fusion of haploid gametes to form zygotes and so on. Both animal and plant cells have some similar structural elements. First off they are both eukaryotic‚ which means they have a defined nucleus. The nucleus contains chromosomes. It is protected and surrounded by the cytoplasm‚ which
Premium Eukaryote Organism Cell
Human development is a process of growing into maturity. Human development entails growth from a one cell zygote to an adult human being. Human development lets us know who we are and it shows us how we interact on a day to day basic. Within the foundation of human development we learn to understand bio-psychosocial dimensions‚ the concept of human diversity and cultural competence as well as the connection of general systems and social order. All of these characteristics are put in place so you
Premium Sociology Culture Human
There is one main difference between prezygotic and postzygotic gene barriers. The postzygotic barriers prevent a hybrid zygote from developing into a viable‚ fertile adult. Examples of a postzygotic gene barrier is a ‘hybrid inviability’ which is a hybrid that fails to develop or fails to reach sexual maturity. Another example of a postzygotic barrier is ‘behavioral sterility
Premium Natural selection Charles Darwin Evolution
their own way. Animals are creative in their own way of innovation and adaptation. But what about human beings? Are we creative to find beauty in our lives and add beauty to others’ life? The very essence of formation of human body from a single cell zygote to a multicellular body is the creativity of nature. But the human mind has somehow lost its ability to think of new ideas and change the world. There is a global institution that is labeling millions of people as failures just because they failed
Premium Ravi Shankar Education Psychology