1.
How many chromosomes do human sex cells have? (1 point)
22
43
46
23
2.
The actual genetic makeup of an organism for a particular trait is called the ______. The physical characteristic that trait gives the organisms is called the ______. (1 point)
genotype; phenotype
genome; allele
dominant; recessive
none of the above
3.
Of the following, which represents a homozygous recessive genotype?
(1 point)
TT
Tt
tt
TTT
4.
Structures in organisms that are no longer of use are called ______ structures. (1 point)
homologous
obsolete
vestigial
analogous
5.
Change in the hereditary features of a type of organism over time is ______. (1 point)
growth
biogenesis
spontaneous generation
evolution
6.
Studying the early growth and development of animals provides clues to their shared ancestry; this field of study is called ______. (1 point)
embryology
ecology
radiology
oncology
FOR #7-10: the answer choices are dominant, alleles, genetic engineering, recombinant, genes, recessive
7.
Because of ______, tomatoes can now be picked and transported great distances before they ripen. (1 point)
8.
Inserting a useful gene into the DNA of another organism is called ______ technology. (1 point)
9.
______ are different forms of a gene that codes for a certain trait. (1 point)
10.
Gregor Mendel discovered some alleles can cover up the presence of others; these alleles are called __________. (1 point)
My answers:
1. 23
2. genotype; phenotype
3. tt
4. vestigial
5. growth
6. embryology
7. genetic engineering
8. recombinant
9. alleles
10. recessive
relook at 5, 10
5 would be Evolution, and 10 would be dominant.
i think 1 is 46
7 is evolution my brother just took the test and he got 100. Number 1 is 23
Guys are you'll in homeschool I am what school;
5 is evolution and 7 is correct
1. To determine the number of chromosomes human sex cells have, you can perform a quick search using a reliable source such as a biology textbook or a reputable website. In this case, human sex cells, also known as sperm and eggs, are known as haploid cells, meaning they contain half the number of chromosomes as regular body cells. Humans have a total of 46 chromosomes in their body cells, which include 22 pairs of autosomes and 1 pair of sex chromosomes. Therefore, the correct answer is 23 chromosomes.
2. To answer this question, you need to understand the definitions of the given terms. The actual genetic makeup of an organism for a particular trait is called the genotype, while the physical characteristic that trait gives the organisms is called the phenotype. So, the correct answer is "genotype; phenotype."
3. A homozygous recessive genotype refers to a genotype in which both alleles for a specific trait are recessive. To determine the homozygous recessive genotype among the given options, you can understand that tt represents a pair of recessive alleles for a specific trait. Therefore, the correct answer is "tt."
4. To identify the structures in organisms that are no longer of use, you should be familiar with the term used to describe such structures. The correct term for structures that have lost their original function is "vestigial structures."
5. Change in the hereditary features of a type of organism over time is referred to as "evolution." Evolution is the result of various factors such as genetic variation, natural selection, and environmental changes.
6. The field of study that focuses on the early growth and development of animals providing clues to their shared ancestry is called "embryology."
7. Genetic engineering is a process that involves modifying an organism's DNA to enhance specific traits or characteristics. Due to genetic engineering, tomatoes can now be picked and transported great distances before they ripen, thus delaying the ripening process and extending their shelf life. Therefore, the correct answer is "genetic engineering."
8. Inserting a useful gene into the DNA of another organism is referred to as "recombinant technology" or "recombinant DNA technology."
9. Different forms of a gene that code for a certain trait are known as "alleles." Alleles are alternative versions of a gene that can result in different variations of a trait.
10. Gregor Mendel discovered that some alleles can mask or cover up the presence of others. These alleles are known as "dominant alleles."