Most terrestrial animals crawl. Snails and slugs crawl on a specialized foot. Newts, salamanders and lizards crawl too. Frogs and toads crawls when they are not hopping and so do insects. Flies, moths and bees crawls when not in flight. Some animals crawls at some stages of life but not others - for example baby humans crawl as do caterpillars before they turn into butterflies!
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Answer:
C)Parental: 41% Dr, 41% dR; recombinant: 9% DR, 9% dr.
Explanation:
The notation Dr/dR for genotypes means that one homologous chromosome has the alleles Dr and the other homologous chromosome has the alleles dR.
The heterozygous plant Dr/dR will produce 4 types of gametes: two identical to the chromosmes the individual has in its somatic cells (called parental), and two gametes which will be a mix of the alleles in the homologous chromosomes (called recombinant).
- Dr: parental
- dR: parental
- DR: recombinant
- dr: recombinant
To calculate the frequency of each type of gamete, we must use the formula:
Distance (map units) / 100 = frequency of recombination.
18 mu / 100 = 0.18.
The total frequency of recombination between the genes D and R is 0.18, but every time crossing over happens, two recombinant gametes are generated. Therefore, each recombinant gamete will have a frequency of 0.18/2=0.09 = 9%.
The frequency of parental gametes will be:
1 - frequency of recombinant gametes
1 - 0.18 = 0.82
But there are 2 parental gametes, so each of them will have a frequency of 0.82/2=0.41 = 41%.
Answer:
Gene delivery
Explanation:
This a process whereby gene is introduced into the DNA of another species in order modify or tamper some of its characteristics.
Answer:
A. acquired traits can be passed to offspring.
Explanation:
Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
Due to osmosis water molecules move from a region of higher water potential to a region of lower potential, so water molecules will move from the vacuole to the salt solution. This causes the cell to become soft and flaccid, turgor pressure will also be lost