Description : What would be the ratio of chromosome number between an egg and its zygote? How is the sperm genetically different from the egg? -Biology
Last Answer : The ratio of chromosome number between egg· and its zygote is 1 : 2. An egg is a female gamete, it has haploid number of chromosomes. ... Sperms and eggs are genetically different in terms ... chromosome. The sperm contain either X or Y-chromosome whereas an egg will always have an X-chromosome.
Description : Cri-du-chat syndrome in humans is caused by the (a) trisomy of 21st chromosome (b) fertilisation of an XX egg by a normal Y-bearing sperm (c) loss of half of the short arm of chromosome 5 (d) loss of half of the long arm of chromosome 5.
Last Answer : (c) loss of half of the short arm of chromosome 5
Description : After the union of sperm and egg, the single-celled zygote develops into a multicellular organism with specialized cells by the processes of?
Last Answer : mitosis and diffrentiation
Description : (a) If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human: (i) Sperm (ii) Zygote (b) Name an animal in which individuals can change sex. What does this indicate? -Science
Last Answer : (a) A normal human being has 46 chromosomes in which 23 chromosomes come from males and 23 chromosomes come from female. (i) Sperms coming from males have 23 chromosomes. (ii) Zygote forming in ... chromosomes in all. (b) Snail. This indicates that sex is not determined genetically in such animals.
Description : . Select the incorrect statement. (a) Human males have one of their sex-chromosome much shorter than other. (b) Male fruit fly is heterogametic. (c) In male grasshoppers, 50% of sperms have no sex-chromosome. (d) In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.
Last Answer : (d) In domesticated fowls, sex of progeny depends on the type of sperm rather than egg.
Description : 2. A human cell containing 22 autosomes and a Y chromosome is probably a a) somatic cell of male b) sperm cell c) somatic cell of female d) unfertilized egg cell
Last Answer : b) sperm cell
Description : Identical twins are born when (a) Two sperms fertilise one ovum (b) Two sperms fertilise two ovums simultaneously (c) Open sperm fertilizes the ovum and zygote divides into two separate cells developing independently (d) One sperm fertilises two ovums
Last Answer : Ans:(c)
Description : The test-tube baby programme employs which one of the following techniques? (a) Intra Cytoplasmic Sperm Injection (ICSI) (b) Intra Uterine Insemination (IUI) (c) Gamete Intra Fallopian Transfer (GIFT) (d) Zygote Intra Fallopian Transfer (ZIFT)
Last Answer : (d) Zygote Intra Fallopian Transfer (ZIFT)
Description : Meiotic division of the secondary oocyte is completed (a) prior to ovulation (b) at the time of copulation (c) after zygote formation (d) at the time of fusion of a sperm with an ovum.
Last Answer : (d) at the time of fusion of a sperm with an ovum.
Description : 88. The Test-tube Baby Programme employs which one of the following techniques ? (1) Zygote intra fallopian transfer (ZIFT) (2) Intra cytoplasmic sperm injection (ICSI) (3) Intra uterine insemination (IUI) (4) Gamete intra fallopian transfer (GIFT)
Last Answer : ) Zygote intra fallopian transfer (ZIFT)
Description : Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages? -Biology
Last Answer : How is the constancy maintained in these three stages? Answer. Yes, zygote, embryonic cell and adult of a particular organism always constant have constant chromosome number. Sexual reproduction includes gamete formation through meiosis and fertilization.
Description : In a cell haploid chromosome number is 15. What number is found in Pollen grain, Zygote, Primary endosperm nucleus and Colchicine treated zygote.
Last Answer : Ans: 15 in pollen grain, 30 in zygote, 45 in Primary Endosperm nucleus and 60 in colchicine treated zygote.
Description : A fruit fly is heterozygous for sex-linked genes, when mated with normal female fruit fly, the males specific chromosome will enter egg cell in the proportion (a) 3 : 1 (b) 7 : 1 (c) 1 : 1 (d) 2 : 1.
Last Answer : (c) 1 : 1
Description : Assertion : Cleavage in human zygote is holoblastic . Reason : Its egg contain enormous quantity of yolk.
Last Answer : Assertion : Cleavage in human zygote is holoblastic . Reason : Its egg contain enormous quantity of yolk ... D. If both Assertion & Reason are False.
Description : A change in the amount of yolk and its distribution in the egg will affect (a) pattern of cleavage (b) number of blastomeres produced (c) fertilisation (d) formation of zygote.
Last Answer : a) pattern of cleavage
Description : Filiform apparatus is a characteristic feature of (a) suspensor (b) egg (c) synergid (d) zygote.
Last Answer : (c) synergid
Description : Nondisjunction of a chromosome results in which of the following diagnoses? a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two ... genetic condition that may occur in a single family member as a result of spontaneous mutation.
Last Answer : a) Down Syndrome When a pair of chromosomes fails to separate completely and creates a sperm or oocyte that contains two copies of a particular chromosome (nondisjunction) Down syndrome results from three number 21 chromosomes.
Description : When you think back to the beginning of your existence, do you identify yourself as the sperm cell, or do you identify yourself as the unfertilised egg cell?
Last Answer : Hmm. Well…. I guess I consider myself the sperm. I am a guy though…. I suspect others will think they are more like their gender identity as well.
Description : Have you ever been or would you consider being an anonymous sperm or egg donor? Why or why not? (See details, please)
Last Answer : It would be too weird for me to both father a child and not raise it, and father a child and not even know about it.
Description : Do you think that children of sperm or egg donors have the right to retroactively demand the identities of the anonymous donors and win in court?
Last Answer : If they donors wanted not to be anonymous, they would… not have been anonymous. It’s a bummer for these kids but I don’t see any reason why they would have a right to this information.
Description : What are the functions and adaptions of the following;a. Palisade cellb. Spongy mesophyll cellc. Sperm and egg celld. Ciliated cellse. Root hair cellf. Red and white blood cells?
Last Answer : common unvalidated interventions
Description : Which differentiates a sperm from egg
Last Answer : Which differentiates a sperm from egg A. Cytoplasm is more abundant in sperm than in egg B. Accessory ... form a sheath in egg and diffused in sperm.
Description : Besides activating the egg, another role of a sperm is to carry to egg
Last Answer : Besides activating the egg, another role of a sperm is to carry to egg A. RNA B. Ribosomes C. Mitochondria and 9+2 arrangement of microtublues D. DNA
Description : In oogensis, egg is fertilised by sperm at which stage?
Last Answer : In oogensis, egg is fertilised by sperm at which stage? A. Primary oocyte B. Secondary oocyte C. Oogonium D. Ovum.
Description : On fertilization of egg nucleus with sperm nucleus
Last Answer : On fertilization of egg nucleus with sperm nucleus A. Second maturation is completed B. Embryo is ... body is formed D. First maturation is completed.
Description : Which chemical of the egg attracts and holds sperm?
Last Answer : Which chemical of the egg attracts and holds sperm? A. Fertilizin B. Antifertilizin C. Agglutin D. Angtiagglutin.
Description : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time of ovulation eggs found in secondary Oocyte phase .
Last Answer : Assertion : When sperm enters in egg , one polar body is released in human . Reason : At the time ... False . D. If both Assertion & Reason are False.
Description : The phenomenon of nuclear fusion of sperm and egg is known as :
Last Answer : The phenomenon of nuclear fusion of sperm and egg is known as : A. Karyogamy B. Parthenogenesis C. Vitellogenesis D. Oogenesis
Description : At the time of fertilization sperm head enters in the egg from :-
Last Answer : At the time of fertilization sperm head enters in the egg from :- A. Any where B. Animal pole C. Vegetal pole D. Lateral side of egg
Description : Adaptation for approach of sperm of egg in mammals -
Last Answer : Adaptation for approach of sperm of egg in mammals - A. Sperm kept inactive till ejaculation B. Very ... C. Peristalsis of oviduct D. All the above
Description : Which part of sperm enters in egg in human ?
Last Answer : Which part of sperm enters in egg in human ? A. Complete sperm B. Only head C. Head and middle piece D. Head and acrosome
Description : Sperm differs from egg in having :-
Last Answer : Sperm differs from egg in having :- A. Power of motility B. No stored food C. More in numbers D. All of the above
Description : The formation of egg and sperm is affected by `
Last Answer : The formation of egg and sperm is affected by ` A. LH B. MSH C. TSH D. FSH
Description : Where does Fertilization of a human egg by sperm takes place?
Last Answer : In the Fallopian tubes,
Description : What process by which the egg cell and sperm cell unite during sexual reproduction?
Last Answer : The process is known as fertilisation (or fertilization in American English)
Description : If an egg cell contains 50 chromosomes how many chromosomes are in sperm cell from the same species?
Last Answer : 50
Description : What is the journey of a sperm to meet egg?
Last Answer : What is the answer ?
Description : Are gametes a sperm and egg cell?
Last Answer : Need answer
Description : How do you use sperm and egg in a sentence?
Last Answer : Fertilization occurs when a sperm and egg unite.
Description : Every multicellular organism, be it a microscopic alga, a banyan tree or a human being, starts as a single cell called a/an (a) Egg (b) Sperm (c) Nucleus (d) Gene
Last Answer : Ans:(a)
Description : Sperm and egg nuclei fuse due to (a) base pairing of their DNA and RNA (b) formation of hydrogen bonds (c) mutual attraction due to differences in electrical charges (d) attraction of their protoplasts.
Last Answer : attraction of their protoplasts
Description : In an egg, the type of cleavage is determined by (a) the amount and distribution of yolk (b) the number of egg membranes (c) the shape and size of the sperm (d) the size and location of the nucleus.
Last Answer : (a) the amount and distribution of yolk
Description : In our society women are blamed for producing female children. Choose the correct answer for the sex-determination in humans. (a) Due to some defect like aspermia in man. (b) Due to the genetic make up of the ... . (c) Due to the genetic make up of the egg. (d) Due to some defect in the women.
Last Answer : (b) Due to the genetic make up of the particular sperm which fertilises the egg.
Description : Extrusion of second polar body from egg occurs (a) simultaneously with first cleavage (b) after entry of sperm but before fertilisation (c) after fertilisation (d) before entry of sperm into ovum.
Last Answer : (b) after entry of sperm but before fertilisation
Description : Which one of the following statements about human sperm is correct? (a) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation. (b) The ... a sensory structure leading the sperm towards the ovum. (d) Acrosome serves no particular function
Last Answer : (b) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation.
Description : Which of the following statement about reproductions in human is correct. a) fertilisation takes place externally b) fertilisation takes place in the testes c) during fertilisation egg moves towards sperm d) fertilisation takes place in human female
Last Answer : d) fertilisation takes place in human female
Description : Set of reproductive terms are given below . Choose the set that has incorrect combination a ) sperms ,testis, sperm duct ,penis b)menstruation, egg, oviduct ,uterus c) sperm, oviduct, egg, uterus d)ovulation, egg, oviduct , uterus
Last Answer : c) sperm, oviduct, egg, uterus
Description : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as
Last Answer : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as – Heterofertilization
Description : The development of an egg without fertilization by a sperm is referred to as:
Last Answer : ANSWER: PARTHENOGENESIS
Description : How many chromosome shal be present in a diploid cell at mitotic anaphase if its egg cell has the chromosome :-
Last Answer : How many chromosome shal be present in a diploid cell at mitotic anaphase if its egg cell has the chromosome ... 20(Twenty) C. 30(Thirty) D. 40(Forty)