Answer:
Considering that white eyes are a recessive trait in flies, it is possible for two red-eyed flies to have offspring with white eyes only if both are heterozygous for this trait.
Explanation:
For two individuals with dominant phenotype for a trait to have offspring with the recessive trait, both must have a heterozygous genotype.
In the case of the characteristic eye color of the flies
:
- <em>Red eye (R) is dominant trait.
</em>
- <em>White eyes (r) is the recessive trait.
</em>
When both parents are heterozygous, their genotype is Rr
In Punnett Square it can see the result of the crossing of these individuals:
Punnett Square
:
<em><u>Rr X Rr
</u></em>
<em>Alleles R r
</em>
<em>R RR Rr</em>
<em>r Rr rr</em>
In the offspring, the probabilities are:
- 50% heterozygous individuals Rr, with red eye phenotype.
- 25% pure dominant individuals RR, with red eyes
- 25% individuals with the recessive rr genotype, white eyes.
<u>This is the possibility of two red-eyed flies having white-eyed offspring</u>.
Answer:
All plants of purple colour.
Explanation:
All the offspring plants of F1 generation have purple leaves because Ay is dominant allele which appear in the leaf colour instead of A2 which is a recessive allele. In the F1 generation, the dominant allele must appear in the shape and structure of the offspring whereas the recessive allele does not appear so offspring of purple leaves appear if plants have purple leaves cross with white leaves.
Answer: D, A, C
Explanation: Cell Wall, Plasma Membrane, Flagella
I believe a OCEAN would be the answer.
Answer:
Pelvic inflammatory disease salpingitis and endometriosis can lead to ectopic pregnancy.