Papadaki M., Papadopoulou M., Siggelaki I., Mylonas C.C. 2008. Egg and sperm production and quality of sharpsnout sea bream (Diplodus puntazzo) in captivity. Aquaculture 276 (1-4): 187-197. DOI: 10.1016/j.aquaculture.2008.01.033....
Spermatophore production and egg-laying behaviour in Rhodnius prolixus Stal. (Hemiptera; Reduviidae)Spermatophore production and egg-laying behaviour in Rhodnius prolixus Stal. (Hemiptera; Reduviidae)1. Spermatophore production inRhodniusandTriatomais a structural adaptation for copulation and sperm delivery. ...
3.in the female mammal, the cell from which the young one is formed; the ovum.The egg is fertilized by the male sperm.óvulo ˈegg-cupnoun a small cup-shaped container for holding a boiled egg while it is being eaten.huevera
A single copulation with a normal male has at most a minor and short-lasting effect on the eggproduction rate of a female, even when enough sperm is transferred to make possible production of some fertile eggs for several weeks. Not enough sperm is transferred to allow fertilization of all ...
planarians, during maturation divisions. In other cases, a new cell center is formed after fertilization from centrioles introduced by sperm or, infrequently, by new formation. Yolk inclusions are a specific constituent of the cytoplasm. The differences in amount and distribution of yolk in ...
Eggs were pink and up to -750 pm in diameter; spermaries were gray to beige, and up to -450 pm in diameter. Female polyps sel- dom contained more than 4 large (1400pm) eggs, while male polyps contained as many as 22 spermaries. Variability in egg production. Egg production by a ...
Describe how the egg and sperm are produced or developed. ___ is the fusion of egg and sperm. Describe the difference in the production of sperm by males and eggs by females. Explain why the egg is fertilized in the fallopian tube, rather than in the uterus. How does the fertilized...
bibens several copulations are necessary for total egg production. Evidence was found that egg deposition depends on the quantity of sperm transferred during insemination. Relatively more males developed from eggs deposited during the first day of egg deposition but males are produced throughout the ...
How many pairs of chromosomes do humans have, and the total number of chromosomes? How many chromosomes are present when meiosis I starts? Somatic cells of the fruit fly have 8 chromosomes. How many sex chromosomes are present in a fruit fly sperm cell?
The production of a fertilizable ovum is a protracted process spanning the embryonic, post-natal, prepubertal and sexually mature life of the mammalian female. In Figure 1.1 the life history of the rat ovum is depicted schematically on the background of ontogenetic development. ...