Genetics and CRISPR in Cattle Breeding

What is the primary goal of selective breeding in cattle?

• To increase the size of the cattle

• To select for desirable traits such as coat color

• To increase the aggressiveness of cattle

• To decrease the intelligence of cattle

Why do dairy farmers prefer all female offspring?

• Females produce milk

• Females are easier to handle

• Females produce more meat

• Females are less aggressive

What is the main function of the SRY gene?

• It decreases the size of the cattle

• It determines the coat color of the offspring

• It increases milk production in females

• It initiates male gonadal development

What is the CRISPR-Cas9 system used for in cattle breeding?

• To make cattle more aggressive

• To decrease the intelligence of cattle

• To increase the size of the cattle

• To introduce specific genes like SRY into livestock

Why was the ZFX gene selected for the SRY gene insertion?

• Because it determines the coat color

• Because it is a known bovine X-inactivation escapee

• Because it increases the size of the cattle

• Because it is associated with milk production

What was the main challenge in creating a bull that only produces male offspring?

• Decreasing the intelligence of cattle

• Making cattle more aggressive

• Increasing the size of the cattle

• Finding a suitable place for the SRY gene insertion

What was the outcome of the initial attempts to create viable pregnancies with the SRY insertion?

• The cows became more aggressive

• Only half of the attempts were successful

• No pregnancies were achieved

• All attempts were successful

What does the presence of the H11 locus signify in the experiment?

• It is a safe insertion site for new genes

• It determines the coat color of the offspring

• It is associated with milk production

• It increases the size of the cattle

Who is Cosmo in the context of this research?

• A control specimen

• The world's first SRY knock-in bull

• A dairy cow

• The lead researcher

What future plans does the team have for Cosmo?

• To decrease his intelligence

• To study his offspring's gender characteristics

• To increase his size

• To make him more aggressive