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Vika [28.1K]
3 years ago
11

Which of the following does not generally occur? A. A single sperm fertilizing a single egg B. Two different sperm both fertiliz

ing the same egg C. A fertilized egg splitting into two embryos D. Two sperm fertilizing two different eggs at the same time
Biology
2 answers:
MaRussiya [10]3 years ago
5 0

Answer: B. Two different sperm both fertilizing the same egg.

Explanation:

Fertilization is a process which involves the fusion of haploid gametes such as a sperm from male and an egg from female to develop a diploid zygote either inside the body of female mate (internal fertilization) or outside the body of female mate (external fertilization).

B. Two different sperm both fertilization the same egg. is the correct option. As only one sperm can fertilize the egg. The sperm brings changes in the external membrane of the egg which prevents the fusion with other sperm.

PIT_PIT [208]3 years ago
4 0

Answer:

B. Two different sperm both fertilizing the same egg

Explanation:

Two different sperm both fertilizing the same egg

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In horses, Chesnut hair color is recessive to black. The pacing gait is recessive to trotting and long hair is recessive to shor
Vitek1552 [10]

9:3: 3:1  is the phenotypic ratio showing traits as black and long hair : black and short hair: chestnut and long hair: chestnut and short hair when a chestnut horse heterozygous for pacing and hair length with a hybrid horse.

Explanation:

Dominant trait = black hair colour (BB,Bb), trotting (TT,Tt) , long hair (LL,Ll)

recessive trait = chesnut hair colour (bb), pacing gait (tt), short hair(ll)

cross between chestnut horse heterozygous for pacing and hair length will have alleles as BbLl

alleles for hybrid horse will also be heterozygous Bb, Ll

Punnett square to show the cross:

      BL         Bl       bL         bl

BL  BBLL  BBLl     BbLL    BbLl

Bl   BBLl    BBll     BbLl      Bbll

bL  BbLL  BbLl      bbLL     bbLl

bl    BbLl  Bbll       bblL        bbll

phenotype ratio

black and long hair : black and short hair: chestnut and long hair: chestnut and short hair

9:3: 3:1  is the phenotype ratio.

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when we observe an organism or environment what are we observing A. changes B. similarities C. colors​
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Explanation:

If I'm wrong I'm so sry T-T

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Answer:

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