21. A mother’s use of cigarettes and alcohol is most damaging to the fetus during the...

21. A mother’s use of cigarettes and alcohol is most damaging to the fetus during the third trimester of pregnancy.

22. It is possible for healthy individuals to be carriers for a dominant genetic disease.

23. “Phenotype” refers to the allelic composition of an individual while “genotype” is what is expressed.

24. Transcription refers to the process of transferring DNA sequence information to RNA.

25. There is little scientific consensus regarding the idea that current global climate change is largely human-induced.

26. The term “anthropogenic” refers to changes in the environment that are naturally-occurring.

Solutions

Expert Solution

21. False .

It is potentially harmfull in first trimester of pregnancy ,as organogenesis occurs in first trimester. Though alcohol can cross placenta and induce malformations throughout gestation m either way the sentence is not accurate.

22. False

Dominant diseases do not have a carrier genotype and dominant diseases are inherited both in homozygous dominant and heterozygous genotypes. Carriers occur in recessive inheritence.

23. False .

Phenotype is the expression if a trait and genitype is allele ir genetic composition.

Fir eg a tall plant has alleles TT.

So TT is Genotype and tall is phenotype.

24. True.

Transcription is copying dna sequences to mRNA.

Translation is protein synthesis from the nucleotides on mRNA to amino acids .

25. False.

There is sufficient data suggesting that current global climate scenario is human induced it is majorly due to release of green house gases by burning of fossil fuels in vehicular and industrial pollution.

26. False

Anthropogenic means changes in environment which are a result of human activities such as pollution , overexploitatiin of resources etc.

If this helps please give it a positive rating thank you!

gladiator answered 1 year ago

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