Answer:
The three genes in coupling are in repulsion.
Explanation:
Coupling happens when the dominant alleles and the recessive alleles are on the same homologous chromosome, while the repulsion happens when one chromosome has one dominant allele and one recessive allele and another homologous chromosome also has dominant and recessive alleles.
If the progeny has:
nb+ ls+ a/nb ls a ⇒ nb+ ls+ a
nb ls a+/nb ls a ⇒ nb ls a+
Where nb+ ls+ a is the dominant alleles and nb and nb+ is in middle.
ls+ nb+ are on the same chromosome (both dominant)
ls nb are on the same chromosome (both recessive)
ls nb, these two are in coupling with each other, but ls+ and a are on the chromosome and ls+ or nb+ are dominant, while nb+ and a are recessive on form a, thus, ls and nb, they are in repulsion with a.
Genetic information is carried in the linear sequence of nucleotides in DNA. Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T base pairs.
Answer:
True.
Explanation:
Both males and females have equal number of chromosomes i.e. 46.
Both males and females have 22 pair of chromosomes and 1 pair of sex chromosomes.
Sex chromosomes in females consist of 2 X chromosomes.
Sex chromosomes in males consist of 1X and 1Y chromosome.
The difference in the sex chromosomes is responsible for the different genders.
⇒It is concluded that although males and females both have equal number of chromosomes but the X and Y chromosome differ in shape. Hence, it is implied that male and female chromosomes differ in shape.
However, I did not pass the test.
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