36.A 【解】 文第-"Identical twins are born when an egg divides into two, resulting in the birth of two children with identical genes. "可知,本句简要说明了双胞胎产生的原因。 空处应承接上文,故A项 (我们都知道这样的双胞胎在外貌上大多很相似)符合语境。
【解析】 AGFDB 1.A.理解判断题,根据前文Identical twins ar e born when an egg divides into two, resultin g in the birth of two children with identical g enes.可知当一个卵分裂成两个卵时,就产生了同 卵双胞胎,这就产生了两个基因相同的孩子.A 项:We all know such twins are often very si...
Identical, or monozygotic, twins develop from the same fertilized egg that splits into two. These twins are the same sex and share the same genes. Sometimes called paternal twins, identical twins provide evidence of a high degree of genetic influence on
Identical twins come about when a single fertilised egg splits in two, meaning they haveexactly the same DNA– theyare clones. Fraternal twins form when two separate eggs are fertilised by two separate sperm. Because each egg and sperm has a differentmix of parental DNA, only 50 per cent ...
Identical twins are also called monozygotic twins (单卵双胞胎). They come from a single egg. That egg forms an embryo (胚胎). Then, it splits into two embryos. Each of these embryos will go on to become a baby.Identical twins have long been thought to have the exact same genes. That...
T hat egg forms an embryo (胚胎). T hen,it splits into two embryos. Each o f these embr yos will go on to become a baby.Identical twins have long been thought to have the exact same genes. T hat's why some scientific studies study these twins. Such stud ies try to determine ...
This type of twin formation begins whenone sperm fertilizes one egg (oocyte). 1 As the fertilized egg (called a zygote) travels to the uterus, the cells divide and grow into a blastocyst. In the case of monozygotic twins, the blastocyst then splits and develops into two embryos. ...
Identical twins, or monozygotic twins, form when one fertilized egg splits in two and grows into two separate embryos. Identical twins may or may not share the same placenta but commonly have their own amniotic sac. Can Identical Twins Be a Boy and a Girl?
That egg forms an embryo(胚胎). Then, it splits into two embryos.Each of these embryos will go on to become a baby.Identical twins have long been thought to have the exact same genes.That's why some scientific studies study these twins. Such studies try to determine whether particular ...
Fraternal Twins, or dizygotic,twinhave two distinct amniotic sacs, placentas, and supporting components since they are two separate fertilized embryos. Depending on how quick the single fertilized egg splits into two identical twins or monozygotic, Fraternal Twins may or may not share the identical...