RP, Rp, rP, rp, and the 16 squares represent the different kinds of zygotes formed and the proportions in which they occur.
As {38} the figure shows, 9 zygotes contain both R and P, having a double or a single dose of either or both of these factors.
A {78} hornless ram, therefore, put to a flock of F1 ewes should give rise to equal numbers of zygotes which are heterozygous for the horned character, and of zygotes in which it is completely absent.
The bringing together of these two series of gametes must result in equal numbers of the four kinds of zygotes FfGg, Ffgg, ffGg, and ffgg, i.
Owing to their peculiar power of growth and the relatively large size to which they attain, many of the properties of zygotes are appreciable by observation.
The attempt to discover a simple explanation of the nature of sex has led us to assume that certain combinations between gametes are incapable of giving rise to zygotes which can develop further.
The resulting F2 generation consequently consists of the four classes of zygotes Ffgg, FfGg, ffGg, and ffGG in equal numbers.
Four zygotes are destitute of P, though they may or may not contain I.
In other words we must on this view suppose that fertilisations between certain forms of gametes, even if they can occur, are incapable of giving rise to zygotes with the capacity for further development.
Consequently the number of zygotes formed containing A is three times as great as the number of zygotes which do not contain A; and similarly for B.
All his gametes consequently contain the inhibitor factor, and when he is mated with an F1 {111} hen all the zygotes produced must contain I.
Such zygotes (FfGg) must always be females, and on this assumption will produce gametes Fg and fG in equal numbers.
In reality we are of four kinds, male zygotes and female zygotes, large gametes and small gametes, and heredity is the link that binds us together.
Three out of the 16 zygotes contain R but not P, and these must be rose-combed birds.
On fertilisation half the zygotes have XX and half XY, whether Y is absence of a sex-chromosome, or one of the other Y forms above mentioned.
When the female gametes segregated, some would always be mY, and some zygotes therefore MXmY.
My conclusion from the evidence is that any process of congenital development may in particular zygotes exhibit a mutation, a departure from the normal.
Looked at from one point of view they belong to the class of genetic variations, which depend upon the structure or constitution of the protoplasm; but instead of appearing in different zygotes (A zygote is a fertilised ovum, i.
Consequently 4 kinds of zygotes are to be expected in F3; and expectation was realized as indicated in table 68.
Combinations in zygotes of the second hybrid generation of the blue strain.
On mating heterozygotes together, zygotes of 16 types will be formed, as in table 57.
Zygotes in F2 of Silkie × Minorca hybrids and their corresponding somatic colors.
Combinations in zygotes of the second hybrid generation of the spangled strain.
To the unaided eye the main difference between the newly formed zygotes of different species of animals is that of bulk, and this is due to the amount of food-yolk held in suspension in the protoplasm.
Thus the dual factor in the zygotes or fertilized eggs at the basis of the first filial (hybrid) generation consists of a single factor for horns and a single factor for their absence.
Half the zygoteswill be HA, one-fourth HH and one-fourth AA.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "zygotes" in a variety of sentences. We hope that you will now be able to make sentences using this word.
