The crossing of a hybrid and a dominant purebred will always result in offspring which are what?
1 answer:
Answer:
Dominant
Explanation:
A hybrid trait is also known as heterozygous, which is the combination of the dominant and recessive alleles of a gene. On the other hand, a purebred is combination of the same two dominant alleles or the same two recessive alleles. For example, in the gene coding for height, allele for tallness (T) is dominant over the allele for shortness (t).
A purebred for this trait will either be "TT" or "tt" while a heterozygous or hybrid will be Tt. Hence, according to this question, crossing of a hybrid (Tt) and a dominant purebred (TT) will always result in offspring which are DOMINANT (see attached image).
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A.<u><em> </em></u>Finding an area in their environment where temperature remains relatively constant
True. The main instinct for animals facing a sudden change in temperature is to take shelter somewhere that maintains a constant temperature.
B. Generating heat internally to help maintain a constant temperature
True. Endothermic animals produce most of the heat internally. When the temperature is low, they increase metabolic heat production to keep your body temperature constant. Therefore we say the body temperature of an endothermic animal independent of the ambient temperature. Some endothermic animals: humans, polar bears, penguins and dogs.
C. Heterozygotes
False. Heterozygote is a term used for an individual in which the alleles of one or more genes are different.
D. Adapting their internal processes to be compatible with the temperatures that they can survive
True. The temperature of ectothermic animals, such as reptiles and amphibians, depends on external heat sources. That is, the temperature of these animals increases or decreases as the temperature of the external environment. Although they also generate a little metabolic heat, it is not enough to maintain a specific internal temperature like endotherms.
E. Inhibiting changes in their metabolism
False. An individual cannot completely inhibit their metabolic changes. It is possible to regulate metabolism (speeding up or slowing down), but preventing these changes from happening on a voluntary basis is not possible.
