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sesenic [268]
3 years ago
12

How does random fertilization add to the genetic variation?

Biology
1 answer:
NikAS [45]3 years ago
6 0
Random fertilization allows random combination of genetic information, which helps synthesize genetically unique gametes. The fusion of a unique sperm together with a unique egg can introduce further variation.
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In a species of chickens, incomplete dominance between alleles for black (B) and white(w) feathers
MariettaO [177]

Answer:

1/2

Explanation:

This question involves a single gene coding for feather color in chickens. The black allele (B) is incompletely dominant over the white allele (W). This means that the allele B will not mask the phenotypic expression of allele W, hence, a third intermediate blue phenotype (BW) will be produced.

According to the question, if two blue chickens are crossed i.e. BW × BW, the gametes B and W will be produced by each parent. Using these gametes in a punnet square (see attached image), the following offsprings will be produced:

BB, BW and WW in the ratio 1:2:1

BB is black, BW is blue, WW is white. Hence, the probability of producing a blue chicken from this cross is 1/2.

6 0
3 years ago
How many chromosomes do each ending cell of meiosis contain
Viefleur [7K]

(See figure below, where meiosis I begins with a diploid (2n = 4) cell and ends with two haploid (n = 2) cells.) In humans (2n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23).

4 0
3 years ago
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Identical twins who have separate placentas are somewhat less similar than identical twins who share a placenta. This best illus
Jobisdone [24]

Answer:

prenatal environments

Explanation:

Depending on the number of fertilized eggs and when the zygote division occurs, there are different types of twins. For example, If the zygote is formed by the union of an ovule and a sperm that after fertilization is divided to create two embryos, they are born identical twins, these babies carry the same genetic information.

4 0
3 years ago
A single strand of dna helic has the code cgctaa. Which would be the complemntary code on the other strand of the helix
Damm [24]
It would be GCGATT. C always compliments G and A always compliments T in the case of DNA coding
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SIMPLE SEVENTH GRADE SCIENCE PROBLEM. GIVING BRAINLIEST.
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Fish and bird are biotic and the bird would hurt the fish depending on the species of birds since some birds are carnivores.
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