The statement about a dichotomous key is true is 2
Answer: The correct answer is D
Explanation: Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere. ... At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed.
Hope this helps bro
Answer: 25 %
Explanation: Adenine and Thymine are base pairs in DNA chain.
So their amounts are equal.
Answer:
The correct answer is - True.
Explanation:
In a simplified drosophila or fruit fly genome, Each chromosome of the homologous pair of chromosomes has the genes for the body color, wing shape, antenna type, and eye color, and all are located on the same chromosome.
So on the basis of the explanation given above it is clear that in Drosophila or fruit flies it is true that Each chromosome has genes that control wing shape, body-color, antenna type, and eye color.
Answer:
The genotype of a black male is XtY
Explanation:
<u>Available data:</u>
- coat color is an X-linked trait with incomplete dominance.
- Yellow coat is caused by the allele XT
- Black coat by the allele Xt.
- Tortoise coat is caused by the heterozygous condition
So,
<u>females genotypes females phenotype </u>
- XTXT → Yellow coat
- XtXt → Black coat
- XTXt → Tortoise coat
<u>males genotype males phenotype</u>
- XTY → Yellow coat
- XtY → Black coat
Males only carry one X chromosome, so they can only be either black - XtY- or yellow -XTY-.
Females are the only ones that can express the tortoise coat.
