Answer:
No, If that was the case, then we should only be eating carbohydrates.
If the extreme phenotypes are crossed while the progeny have intermediate phenotypes, then it would be an incomplete dominance. Which would be B.
1) The correct answer is: 128 combinations.
The genetic combinations that are possible through independent assortment can be calculated as 2^n; where n is the number of different chromosomes.
So, using this formula for 7 chromosomes:
2^7 = 128 different combinations.
2) For a zygote produced by two barley parents, the number of possible genetic combinations can be calculated as: 2^n * 2^n
So, for 7 chromosomes: 2^7 * 2^7=16384
Answer: The probability of having an offspring that is dwarf in size is zero.
Explanation: Since tall phenotype is dominant to dwarf phenotype, let T represent allele for tall and t represent allele for dwarf. A heterozygous pea plant will have Tt genotype while a homozygous tall pea plant will have a TT genotype. A cross between them will produce two homozygous tall pea plants (TT) and two heterozygous tall pea plant (Tt). They will not have any offspring having a dwarf size. Therefore, the probability of having a dwarf offspring is zero.
See the attached punnet square for more information
Chromosomal deletion is the loss of genetic code, caused by a segment of
chromosome breaking away during DNA replication. The best answer is the
third one, "when part of a chromosome breaks off and does not
reattach."
The first answer, "part of a chromosome breaks off
and is inserted into the middle of another", describes chromosomal
insertion.
The second answer, "part of a chromosome breaks off and reattaches backward", describes chromosomal mutation.
The final answer, "part of a chromosome breaks off and attaches to another", describes chromosomal translocation.
